Explanation:
Sucrose is a disaccharide sugar, which means it is comprised of two monosaccharide sugar units. Sucrose is a characteristic synthetic found in plants, despite the fact that it can likewise be synthesized in a lab. It is a lot simpler and less expensive to extract it from plants than to make it without any preparation. Sugarcane and sugar beets are the two plants that are utilized to make most sucrose, or refined table sugar. Splenda is a manufactured sugar that isn't perceived by the body. Sucralose just makes up around 5 percent of Splenda. The other 95 percent contains a building operator called maltodextrin, which fills in as filler, and corn-based dextrose, a sort of sugar. Splenda is utilized as a sugar substitute in cooking and preparing, and it's additional to a great many "zero calorie" nourishment items.
Amylase initiates starch digestion in the mouth, forming maltose, while other enzymes like maltase continue the process in the small intestine. Essential nutrients like fatty acids and amino acids must be consumed in the diet, and pepsin is an enzyme that aids in protein digestion in the stomach. Triglycerides serve as a significant energy storage molecule in the body.
Explanation:Throughout the process of digestion, various enzymes and hormones play essential roles in breaking down the food we eat into usable nutrients. One such enzyme is amylase, which is secreted in the saliva and begins the digestion of starches by breaking them into smaller particles, eventually forming the disaccharide maltose. Once the food reaches the duodenum, pancreatic juices containing more amylase continue this breakdown. Disaccharides like maltose, sucrose, and lactose are further digested into monosaccharides (glucose, fructose, and galactose) by the enzymes maltase, sucrase, and lactase present in the small intestine.
As part of the dietary macronutrients required by our body, essential fatty acids and essential amino acids must be obtained through food, as our bodies cannot synthesize them. The digestion of proteins begins in the stomach, where the enzyme pepsin initiates the breakdown of proteins into shorter chains and amino acids. Combinations of different food sources, such as beans and rice, can provide all nine essential amino acids and are known as complementary proteins. Lastly, a triglyceride is a molecule consisting of three fatty acids attached to a glycerol backbone, serving as an important form of energy storage in our bodies.
Four of the five processes listed below will disrupt Hardy-Weinberg equilibrium. Select the exception. a. natural selection b. genetic drift c. punctuated equilibrium d. non-random mating e. migration
Answer:
B, C, D, and E
Explanation:
Hardy-Weinberg equilibrium is defined as the model that explains the relationship between phenotypic and genotypic frequencies relationship, using the five assumptions of:
No mutationNo migrationNo selectionRandom matingInfinite populationAnswer:
natural selection, genetic drift, non-random mating, and migration (option A, B, D, and E)
Explanation:
In the Hardy-Weinberg equilibrium principle, the frequencies of alleles and genotypes remain the same in a population, from generation to generation, with no net change in allele or genotype frequencies. This means, no evolutionary change is occurring in the population. However, for this principle to hold, the following conditions must be present, which are:
There must be random mating, that is every individual of the population has an equal chance of mating with any other member the population There must be no net mutation The population size must be large enough to reduce the probability of the allele frequencies to change by genetic drift caused by random fluctuations, as common in a small population size Absence of migration of individuals into the population or outside the population Absence of natural selection which can cause some phenotypes to be selected against othersTherefore, the 4 processes, out of the 5 processes listed, that can disrupt Hardy-Weinberg equilibrium in a population are natural selection, genetic drift, non-random mating, and migration (option A, B, D, and E)
A punctuated equilibrium would not, as the population is said to be stable or become stable over a long period of time with little evolutionary change in the course of life.
Glucose is the primary fuel for cellular respiration. Which molecules can also be used by cellular respiration to generate atp?
Besides glucose, cellular respiration can use starch, sucrose, galactose, lactose, mannitol, fats, and the carbohydrate portion of amino acids for ATP generation.
Explanation:While glucose is the primary fuel for cellular respiration, other molecules can also be utilized to generate ATP. In addition to glucose, substances like starch, sucrose, galactose, lactose, and mannitol can be used in glycolysis. Fats and the carbohydrate portion of amino acids from proteins can also serve as fuel for cellular respiration. These compounds are metabolized within various pathways in the cell such as glycolysis, the Krebs cycle, and oxidative phosphorylation. The ability of the cell to use alternative sources for ATP synthesis is critical for organisms to maintain energy balance and adapt to varying nutritional availability.
With the endosymbiotic hypothesis in mind, what structure within modern-day chloroplasts is likely derived from the cytoplasm of an ancestral cyanobacterium that took up residence within a eukaryotic cell?
The chloroplasts had inner membrane
Explanation:
The primitive photoautotrophs utilized hydrogen sulphide as the electron donor to perform photosynthesis for energy production.
Later upon understanding the endosymbiotic relationship of cyanobacteria which resided in the mitochondria of a eukaryotic host cell, the use of chloroplasts for photosynthesis was understood.
Generations after generations led to the development of chloroplasts by the cyanobacteria due to this symbiotic relationships which developed into the chloroplasts.
The unique presence of the inner membrane and its components like the stroma, thyllakoids helped the organism to utilize water as the electron donor for photosynthesis like the present day eukaryotes. This is the main reason why cyanobacteria is considered as the ancestor for eukaryotes.
When farming, overgrazing, climate change, and/or seasonal drought change farmland into land that cannot support plant life, it is called
a. desertification.
b. depletion.
c. deforestation.
d. monoculture.
Answer:
a. desertification.
Explanation:
Desertification can be defined as encroachment of deserts to areas that were not originally deserts which leads to loss of biological productivity. desertification is caused by some factors which are
Climate Changehuman activitiesloss of moisturedrought.When the above mentioned factors farming, overgrazing, climate change, and/or seasonal drought set in then it changed farmland into land that cannot support plant life.
When farming, overgrazing, climate change, and/or seasonal drought change farmland into land that cannot support plant life, it is called a. desertification. option A
What is Desertification?Desertification is the process through which grasslands and shrublands in drylands, also known as arid and semi-arid lands, decline and eventually vanish. A form of land deterioration known as desertification occurs when biological production in drylands decreases as a result of a combination of natural and human-caused factors, turning productive areas arid.
Desertification is a form of land degradation that takes place in arid regions. It has an impact on the ability of the land to provide ecosystem services, including food production and biodiversity hosting, to name the most well-known ones.
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A person applies a 13.5 N force to a hammer while it moves a distance of .12 m. The hammer completes 1.56 J of work on the nail. What is the efficiency of the hammer? Must show all work, correct sig figs, and include correct units.
Answer:
=96.29%
Explanation:
Work efficiency is the ratio of output to input expressed as a percentage
Work is the product of fore and distance.
Work input =13.5*0.12=1.62 J
Work output= 1.56 J
Efficiency= 1.56/1.62 *100
=96.29%
Which fungal features supports the phylogenetic conclusion that fungi are more closely related to animals than plants?
Answer:
Because fungi like animals are heterotrophs
Explanation:
What is the importance of manipulation and control in the experimental method?
Orchid seeds are tiny, with virtually no endosperm and with miniscule cotyledons. If such seeds are deposited in a dark, moist environment, then which of the following represents the most likely means by which fungi might assist in seed germination, given what the seeds lack?
a. by transferring some chloroplasts to the embryo in each seed
b. by providing the seeds with water and minerals
c. by providing the embryos with some of the organic nutrients the fungi have absorbed
d. by strengthening the seed coat that surrounds each seed
Explanation:
Fungi might assist in seed germination by providing the embryos with some of the organic nutrients the fungi have absorbed
Fungi is an eukaryote which digests food externally and absorbs nutrients directly through its cell walls Fungi absorb nutrients through following three ways:By decomposing dead organic matter: obtains its nutrients from non-living organic matter, usually dead and decaying plant or animal matter, by absorbing soluble organic compoundsBy feeding on living hosts:fungi live in or on other organisms and get their nutrients from their hostLiving mutualistically with other organisms: mutualistic fungi live harmlessly with other living organisms;fungal component absorb water and minerals and provide them to algal component which uses them to make foodIn dark,moist environment nutrient availability is less hence fungi helps in providing orchid seeds the nutrients which it has absorbed
You bite into a cookie. Of the choices provided, what is the fourth step in the pathway from the time tastants enter the mouth to the termination point in the brain. Group of answer choices
Explanation:
The tongue contains little knocks called papillae, inside or approach which taste buds are arranged. In the tongue's taste buds, the taste receptors get tangible information by means of two significant systems – depolarization and synapse discharge. Admission of salty nourishments drives more sodium particles to enter the receptor, causing the said systems. The equivalent is valid with admission of sharp nourishments (hydrogen particles) and sweet nourishments (sugar atoms), the two of which result to the end of K+ channels upon their entrance. From the axons of the taste receptors, the tangible data is moved to the three taste pathways by means of the parts of cranial nerves VII, IX and X. The chorda tympani of CN VII (facial nerve) conveys the taste tangible contribution from the tongue's foremost 66%. At that point, the remainder of the taste sensations from the throat, sense of taste and back tongue are transmitted by the parts of CN IX (glossopharyngeal nerve) and CN X (vagus nerve). From these cranial nerves, taste tangible information goes through the nerve fiber neurotransmitters to the lone tract, the ventral posteromedial thalamic cores , and the thalamus. In these three areas, there are grouped neurons which react to a similar taste (sweet, sharp, salty or bitter).The thalamus transfers the data to the essential gustatory cortex situated in the somatosensory cortex. The essential gustatory cortext is the place the impression of a specific taste is handled.Question 14
How does natural selection work with regards to genes and what is passed to the next generation?
a. Those with the most favorable combination of genes survive and pass their DNA to the next generation.
b. Those with the least favorable combination of genes survive and pass their DNA to the next generation.
c. Those with the most favorable combination of genes die off not allowing their DNA to be passed on to the next generation.
d. Natural selection allows genes to mutate, therefore changing the species.
Answer: a. Those with the most favorable combination of genes survive and pass their DNA to the next generation.
Explanation:
Natural selection acts on the phenotype; the mechanism of evolution is precisely linked to the genotype. Natural selection also affects the frequency of ale. If the allele provides a phenotype that allows the individual to survive better or have more offspring, the rate of that allele will increase.
A woman tells you that her 14-year-old daughter, who was recently diagnosed with type 1 diabetes, has been sick with what appears to be the flu for the past 2 days. What advice do you give her about managing the girl’s diabetes during illness?
Answer & explanation:
Type 1 diabetes is a chronic disease in which the individual's pancreas has complications to the point of producing little or no insulin, characterizing excess blood glucose.
When we get sick, the body usually produces additional glucose for infection-fighting processes.
A diabetic organism usually uses other compounds (such as ketones) in order to complement the missing glucose, these processes, however, can bring several complications, such as blood acidification.
The best advices for a diabetic individual to avoid this type of complication is to always check his/her glucose level, and also to be aware of the vaccination against influenza and pneumonia (considering that in diabetics this risk is greater).
In addition, a doctor must be consulted if the diabetic person contracts flu, obeying the treatment plan and avoiding self-medication at all costs.
Systematists have used a wide variety of traits to reconstruct the phylogenies of particular groups of organisms. Which one of the following traits produces a good estimate of phylogeny?
1. molecular traits
2. gross morphological traits
3. behavioral traits
4. biochemical traits
5. all of the above traits combined
Answer:
5. all of the above traits combined
Explanation:
Phylogeny has to do with the study of evolutionary relationships among living organisms based on the premise of the theory of organic evolution that states that all living organisms came from a common ancestor.
Phylogeny incorporates molecular, morphological, anatomical, biochemical and behavioural traits in order to arrive at a phylogenetic tree that represents ancestral lineages.
Hence, the correct option is option 5.
Answer:
5-All of the above
Explanation:
A phylogenetic tree is a diagram that shows the evolutionary relationships between various biological organisms. During the construction of the phylogenetic tree systematists observe different types of traits, such as:
Derived traits-A trait found in the present organism, but was absent in the ancestor organism.Ancestral trait- A trait that the present organism inherited from their ancestral organism.Coral bleaching, which causes high coral mortality, has been occurring widely in coral reefs. Coral bleaching actually refers to the death of symbiotic dinoflagellates living within the corals. Why does coral bleaching cause the corals to die
Explanation:
Coral bleaching, which causes high coral mortality, has been happening broadly in coral reefs. Coral bleaching really alludes to the death of symbiotic dinoflagellates living inside the corals. Dinoflagellates give supplements from the results of photosynthesis which are fundamental for zooxanthellae endurance. Coral reefs are vital to the science of our planet, however in the previous scarcely any decades, they have endured a serious decay because of an assortment of common and anthropogenic unsettling influences. Natural effects of coral blanching and related mortality Bleached corals are probably going to have diminished development rates, diminished regenerative limit, expanded powerlessness to maladies and raised death rates. Decreases in hereditary and species assorted variety may happen when corals pass on because of dying.Coral bleaching causes corals to die by disrupting the symbiotic relationship between the corals and the algae within them. The algae provide the corals with food through photosynthesis, so when they are expelled, the corals lose their source of nutrition and eventually die.
Explanation:Coral bleaching is a serious issue threatening the survival of coral reefs, primarily caused by rising ocean water temperatures due to climate change and human activities. The phenomenon of bleaching occurs when corals, stressed by the heat, expel the symbiotic dinoflagellates, known as zooxanthellae. These zooxanthellae are crucial as they provide the corals with essential nutrients through the process of photosynthesis, having a mutualistic relationship with the coral polyps. Without these dinoflagellates, the corals lose their vibrant colors and, more significantly, their main source of energy, leading to mortality if the stress conditions persist.
Further exacerbating the situation, increased levels of atmospheric CO2 are absorbed by ocean waters, causing a decrease in pH and leading to ocean acidification. This acidification hampers the coral's ability to perform calcification, which is necessary for building their calcium carbonate skeletons. Without the ability to maintain their skeletons, the corals become weak and more susceptible to death. The decline of coral reefs has a profound impact on marine biodiversity, ecosystem services, and the economies that rely on them.
Even in Darwin's time, the blending hypothesis was incompatible with observed facts. If the blending hypothesis were true, then what should one expect to observe over the course of generations?A) Phenotypic polymorphisms should increase.
B) Genetic variation should increase.
C) Members of a breeding population should become more uniform in phenotype.
D) Neutral variation should decrease.
E) Genetic polymorphisms should increase.
Answer:
C) Members of a breeding population should become more uniform in phenotype.
Explanation:
The blending hypothesis was the accepted theory during the time of Charles Darwin and the Gregor Mendel.
The blending hypothesis suggested that the traits which arise in the offspring is the intermediate form of the mother and father that is if short male crossed with a tall female then will result in the intermediate height of the offspring.
This theory has many limitations as the evidence does not support the theory and also the next generation formed will be more uniform than the previous generation.
Thus, Option-C is correct.
Dietary fiber has been recommended for its possible benefits in reducing heart disease by lowering blood cholesterol. How does fiber play a role in lowering blood cholesterol
Answer:
By lowering the levels of total cholesterol and low density lipoprotein (LDL)
Explanation:
Dietary fibers are classified into two: the soluble fiber and the insoluble fiber. Studies have show that the soluble fiber play a significant role in lowering blood cholesterol, hence reducing the cardiovascular diseases.
Soluble fiber helps to lower blood cholesterol by its ability to bind to the small intestine which further binds to cholesterol most especially the ad cholesterol (low density lipoprotein). Binding of Fibers to cholesterol prevents them from migrating to the blood stream and to other parts of the body. Since cholesterol can't get into the bloodstream, it exits the body through feces. Fiber has more effect on lowering LDL (bad cholesterol) than High density lipoprotein (good cholesterol.
Fiber plays a role in lowering blood cholesterol by binding to cholesterol in the digestive tract and preventing its absorption into the bloodstream. Soluble fiber forms a gel-like substance that traps cholesterol and eliminates it from the body. Additionally, fiber can stimulate the liver to produce more bile acids, which reduces overall blood cholesterol levels.
Explanation:Fiber plays a role in lowering blood cholesterol by binding to cholesterol in the digestive tract and preventing it from being absorbed into the bloodstream. Soluble fiber, found in foods like oats, beans, and fruits, forms a gel-like substance that can trap cholesterol. This gel-like substance is then eliminated from the body through bowel movements.
In addition, fiber can also stimulate the liver to produce more bile acids, which are necessary for the digestion and absorption of dietary fats, including cholesterol. This leads to a reduction in the overall amount of cholesterol circulating in the blood. By reducing blood cholesterol levels, dietary fiber can help reduce the risk of heart disease.
It's important to note that a well-balanced diet, regular exercise, and a healthy lifestyle are all key factors in maintaining heart health, and fiber should be part of a larger heart-healthy plan.
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Biodiversity hotspots: Select one: a. house only 10% of all species of vascular plants. b. are home to nearly 20% of the world's population. c. are all located in tropical regions. d. contain few endemic species. e. all of these choices are correct
Answer:
The correct answer: B. are home to nearly 20% of the world's population.
Explanation:
Biodiversity hotspots are regions with important levels of biodiversity (meaning there are a lot of species on it) that are threatened by human habitation.
For a region to be considered a biodiversity hotspot, it must contain at least 1500 species of endemic vascular plants (this means that these species are unique to that place) and has to have lost around 70% of its primary vegetation. Unfortunately, many species are in biodiversity hotspots, as they are home to 20% of the world's population.
Biodiversity hotspots are all around the world, not just in tropical regions.
Answer:
B. Home to nearly 20% of the world's population.
Explanation:
According to Myers edition of hotspot maps, it must contain at least 0.5% or 1,500 species of vascular plants as endemics, and it has to have lost at least 70% of its primary vegetation. Biodiversity hotspots host their diverse ecosystems on just about 2.4% of the planet's surface.
In summary, biodiversity hotspot is defined as a biogeographic region that is a significant reservoir of biodiversity. The term biodiversity hotspot specifically refers to 25 biologically rich areas around the world that have lost at least 70% of their original habitat. It was estimated in 1995 that more than 1.1 billion people, nearly 20% of world population, were living within the hotspots, an area covering about 12% of Earth's terrestrial surface.
Why is scarcity the basis of all economic decisions? Describe how the role of the government in a society influences the three economic questions. (Site 1)
Answer:
Scarcity is the basis of all economic decision because it will not go away. No matter what there will always be scarcity. It is impossible for the government to provide everything for their people. There are costs for every economic choice the government makes. There is a limit on what we need to produce product whether it is time, money or effort. The government decides the budget of something to be produce. They decide how to make things a certain way. And they choose the how the resources are beneficial to the environment. Scarcity will always be here so we have to learn to make decisions with it.
Explanation:
I put this on edge and got it right
Scarcity is the basis of all economic decision because it will not go away. No matter what there will always be scarcity.
What is the impossible task of the government?It is impossible for the government to provide everything for their people. There are costs for every economic choice the government makes. There is a limit on what we need to produce product whether it is time, money or effort. The government decides the budget of something to be produce. They decide how to make things a certain way.
They choose the how the resources are beneficial to the environment. Scarcity will always be here so we have to learn to make decisions with it. Goods and services are produced through natural resources, which are mostly scarce. In this way, economic theory aims to rationalize the production and distribution of these goods and services to satisfy the demands of society.
Therefore, Scarcity is the basis of all economic decision because it will not go away. No matter what there will always be scarcity.
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Drag and drop the steps of digestion to order them from first to last step.
(order it as 1, 2, 3, etc.)
Answer:
1. the teeth in the mouth bite off a piece of food. the teeth continue to break the food into smaller pieces.
2. saliva rushes into the mouth and mixes with the broken down food.
3. the food travels down the esophagus.
4. the broken down food, called chime, enters the small intestine.
5. the remaining food passes into the large intestine. water is absorbed from the large intestine and the rest of the material is stored as solid waste until it is exerted from the body.
6. the muscles in the stomach churn the food and continue to break it down.
Hope this helps!
Drag and drop the steps of digestion to order them from first to last step. Absorbed into the bloodstream. The 4 primary styles of digestive structures in animals are monogastric, avian, ruminant, and pseudo-ruminant.
What is the digestive system?The digestive machine consists of the mouth, pharynx (throat), esophagus, stomach, small intestine, big intestine, rectum, and anus. It additionally consists of the salivary glands, liver, gallbladder, and pancreas, which make digestive juices and enzymes that assist the frame digest meals and liquids.
the tooth withinside the mouth chew off a chunk of meals. the tooth keep to interrupt the meals into smaller pieces.Saliva rushes into the mouth and mixes with the damaged down meals.The meals travels down the esophagus.The damaged down meals, referred to as chime, enters the small gut.The last meals passes into the big gut. water is absorbed from the big gut and the relaxation of the fabric is saved as strong waste till it's miles exerted from the body.The muscle tissues withinside the belly churn the meals and keep to interrupt it down.Read more about the esophagus:
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________ are cells in the epidermis that are part of the immune system. ________ are cells in the epidermis that are part of the immune system. Dendritic cells Melanocytes Merkel cells Squamous cells Basal cells
The cells in the epidermis that are part of the immune system are called dendritic cells. Dendritic cells are specialized antigen-presenting cells that play a crucial role in initiating and regulating immune responses.So option a is correct.
Dendritic cells are a type of antigen-presenting cell (APC) that are essential for the initiation and regulation of immune responses. They are widely distributed throughout the body, including the skin, where they are referred to as Langerhans cells. In the skin, dendritic cells, specifically Langerhans cells, are found in the epidermis, the outermost layer of the skin. They have long, branching extensions called dendrites, which resemble the branches of a tree. These dendritic extensions are crucial for capturing and processing antigens.
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________ are cells in the epidermis that are part of the immune system. Dendritic cells
Melanocytes Merkel cells
Squamous cells
Basal cells
Final answer:
Langerhans cells are part of the immune system and are found in the epidermis. These dendritic cells take up antigens and present them to the immune system. Melanocytes produce melanin, while Merkel cells respond to touch, and squamous and basal cells have other functions related to skin integrity and regeneration.
Explanation:
The cells in the epidermis that are part of the immune system are known as Langerhans cells. These dendritic cells are located within the stratum basale layer of the epidermis and act as sentinels to protect the skin. Langerhans cells are responsible for taking up antigens, which are molecules that induce an immune response, and presenting them to T cells, a crucial function in the body's defense system.
As for the other cells mentioned, melanocytes are responsible for producing the pigment melanin which protects the skin from UV light, while Merkel cells respond to light touch and are connected to nerve endings in the dermis. Squamous cells, or keratinocytes, make up about 90% of the epidermal cells and are involved in creating a barrier against environmental damage. Lastly, basal cells are found in the stratum basale and are responsible for the production of new keratinocytes.
What are the two groups that are adapted to anaerobic conditions and contain modified mitochondria that lack dna?
The Diplomonads and Parabasalids are the two groups that are adapted to anaerobic conditions and contain modified mitochondria that lack DNA.
Explanation:
The existence of a mitochrondrial-remnant organelle and nonfunctional, named a mitosome distinguishes diplomonads. Parabasalids are distinguished by a semi-functional mitochondria termed as hydrogenosome; they are made up of parasitic protists, including Trichomonas vaginalis.
Diplomonads function in anaerobic circumstances, and use alternate pathways to generate energy, like glycolysis. Growing cell of the diplomonad has two identical nuclei and utilizes multiple locomotive flagella. Trichomonas vaginalis, a parabasalid that induces a human sexually transmitted infection, uses these pathways to pass via the urogenital tracts of males and females.
When animal cells are grown in a petri dish, they typically stop dividing once they have formed a single, unbroken layer on the bottom of the dish. This arrest of division is an example of:___________.A) cancer.B) cell constraint.C) density-dependent inhibition.D) cell division repression.E) growth factor desensitization.
Answer:
The arrest of the division that occurs when animal cells that are growing in a Petri dish and form a single, unbroken layer on the bottom of the dish is an example of density-dependent inhibition (option C).
Explanation:
The animal cell must divide in order to form a tissue or repair it in case of being damaged, counting on regulation mechanisms that allow an adequate and sufficient growth.
Density-dependent inhibition is a mechanism for controlling cell growth that limits cell reproduction to a certain point. When cells are cultured, they can be seen to grow by covering the bottom of the Petri dish, but their division ceases when they occupy the available space. This implies that the agglomeration of cells prevents them from continuing to divide.
The amount of nutrients needed for cell culture growth limits this growth, since cell division depends on the amount of resources available to support a given cell population, which explains the density-dependent inhibition.
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Density-dependent inhibition is the reason why animal cells stop dividing when they form a single layer in a petri dish.
Explanation:The arrest of division in animal cells grown in a petri dish once they have formed a single, unbroken layer on the bottom of the dish is an example of density-dependent inhibition.
This means that the cells stop dividing when they come into contact with each other, as the close proximity of other cells signals to them that there is no more space for growth.
This mechanism helps maintain tissue homeostasis and prevents cells from overcrowding, which can lead to disorderly growth and potentially cancerous conditions.
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For a science fair project, two students decided to repeat the Hershey and Chase experiment, with modifications. They decided to label the nitrogenous base of the DNA, rather than the phosphate. They reasoned that each nucleotide has only one phosphate and two to five nitrogenous bases. Thus, labeling the nitrogenous bases would provide a stronger signal than labeling the phosphates. Why won't this experiment work?
Answer:
Explanation:
The aim of the Hershey and Chase experiment was to show that DNA and not proteins are the genetic material.
Proteins are made up of amino acids which also has a nitrogenous base. Since the whole point of the experiment was to differentiate between the two i.e. show which one is the genetic material, it would be impossible to differentiate between DNA and proteins if the nitrogenous base was labelled.
A ballet dancer falls to the floor and hurts herself during a practice session before opening night. She sustains an injury to the thoracodorsal nerve that would probably affect the strength of which of the following movements? Extension of the arm
The question is incomplete as it does not have the option which are:
Adduction of the scapulaElevation of the scapulaAbduction of the armLateral rotation of the armExtension of the armAnswer:
Extension of the arm
Explanation:
The thoracodorsal nerves are the motor nerves which brings the stimulus from the brain to the effector muscle.
The thoracodorsal nerves arise from the brachial plexus and innervate the Latissimus dorsi which is found in the back of the human body.
The Dorsi muscle is involved in the adduction, extension and adduction of the shoulder joints. In the given question, if the thoracodorsal nerve of the person is affected than the person is not able to extend their arm.
Thus, the selected option is correct.
he thoracodorsal nerve also known as the middle subscapular or long subscapular nerve arises from the posterior cord of the brachial plexus and supplies the
Sticky mucus that lines the body's interior tubes and cavities contains _____, an enzyme that kills bacteria.
a. clostridium
b. amylase
c. lysozyme
d. lactate
e. staphylococcus
Answer:
Answer is
C) Lysozyme
this is an enzyme that kills bacteria
Vibrio cholerae is the bacterium responsible for cholera, a GI tract infection. Normally, it takes the ingestion of over one million bacterial cells to cause infection, but the consumption of antacids signficantly lowers this number. What does this tell you about the likely classification of V. cholerae in terms of pH preference?
Answer:
In terms of pH preference, Vibrio cholerae is classified as an alkaliphile.
Explanation:
Every microorganism like bacteria needs a favorable pH (optimum growth pH) for their growth. Based on the pH preference, microbes are classified into three types: neutrophiles, acidophiles, and alkaliphiles.
Generally, most of the bacteria are neutrophiles. Neutrophiles grow best at pH close to 7 (neutral pH). Escherichia coli, salmonella, staphylococci, etc are examples of neutrophiles. Acidophiles grow best at pH less than 5.55 and lactobacillus, sulfolobus, ferroplasma, etc are examples of acidophile bacteria.
Alkaliphiles grow best between a pH of 8 and 10.5. Natronobacterium, Bacillus firmus, etc are examples of alkaliphiles. The consumption of antacids prevents the growth of vibrio cholerae, the pathogenic agent which causes cholera. So, it belongs to the alkaliphiles group, where it grows best at the pH of 8 and can survive the alkaline environment having pH values up to 11.
Glycogen is stored mainly in which tissues
Answer:
In humans, glycogen is made and stored primarily in the cells of the liver and skeletal muscle.
Insulin converts blood sugar to glycogen and stores it in Liver
Glycogen is primarily stored in the liver and muscles.
How is glycogen storedIn the liver, glycogen serves as a reservoir of glucose that can be released into the bloodstream to maintain normal blood glucose levels between meals. In muscles, glycogen functions as a source of energy during exercise or physical activity.
The liver has the highest glycogen storage capacity among all tissues, allowing it to store and release large amounts of glucose as needed. Muscle glycogen, on the other hand, is primarily used to provide energy for muscle contraction during exercise.
Other tissues in the body can also store small amounts of glycogen, but the liver and muscles are the major sites of glycogen storage.
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For which of the following types of microbes would a microbiologist employ living host cells to support their growth? View Available Hint(s) For which of the following types of microbes would a microbiologist employ living host cells to support their growth? Campylobacteria capnophiles obligate intracellular organisms, such as chlamydias, rickettsias, and viruses normal skin bacteria
Answer:
obligate intracellular organisms, such as chlamydias, rickettsias, and viruses
Explanation:
Obligate intracellular organisms are those living organisms that cannot reproduce outside their host cells. They require intracellular resources of the host in order to live normally and reproduce.
As a result, these type of organism cannot be cultured using ordinary culture media in the laboratory. They will require special intracellular-like resources in order for them to be successfully cultured in the laboratory.
Joan goes to a therapist to learn how to become more assertive. The therapist uses a training technique in which he portrays a social antagonist and Joan portrays herself. Together, they act out the problem situation. This therapeutic technique is called ______.
Answer:
The correct answer is: role-playing.
Explanation:
Role-playing is a technique used in psychotherapy for the treatment of phobia.
Phobias are a learned response to a stimulus that must be unlearned in order to overcome it.
In role-playing therapy, the therapist acts as the person who the patient is afraid to confront, and then the patient responds with the techniques learned in the sessions.
Answer:
Joan goes to a therapist to learn how to become more assertive. The therapist uses a training technique in which he portrays a social antagonist and Joan portrays herself. Together, they act out the problem situation. This therapeutic technique is called role-playing
Explanation:
Role play is an educational technique in which people spontaneously act-out problems of human relations and analyse th eneactment with the help of the oher role players and observers. Educational roleplay asks each student to take the role of the person affected by an issue and studies the impacts of the issues on human life and the effects of human activities on the world around us from the perspective of that person.
Hence in the above scenario, Joan is using role-playing.
A photosystem consists of what structures?
Answer:
is B
Explanation:
A photosystem consists of two closely linked components that are as follows:
The antenna complex. The reaction center. What is Photosystem?Photosystems may be defined as pigment-containing protein complexes that possess reaction centers that convert radiant energy into chemical energy. These systems are considered the functional units for photosynthesis.
Photosystems are typically found in the thylakoid membranes. There are two types of photosystems known till now. They are photosystem I (PSI) and photosystem II (PSII).
Photosystem I works on the wavelength of 700 nm, while photosystem II works on the wavelength of 680 nm.
The antenna complex is formed by hundreds of pigment molecules that capture photons and transfer the harvested light energy. While the reaction center possesses Chlorophyll a molecule in a matrix of protein.
When this excitation energy finally reaches chlorophyll a that is present at the reaction center, electron transfer begins through an electron transport chain.
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The range of electromagnetic energy emitted by the sun, known as the solar spectrum, is found mostly in three regions of the electromagnetic spectrum. Which type of electromagnetic energy is NOT part of the solar spectrum?
Answer:Radio
Explanation:
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Radio type of electromagnetic energy is NOT part of the solar spectrum.
What is Electromagnetic Energy?The range of all EM radiation types is known as the electromagnetic (EM) spectrum. The visible light from a bulb in your home and radio waves from a radio station are two examples of electromagnetic radiation. Radiation is energy that moves and disperses as it does.
Microwaves, infrared light, ultraviolet light, X-rays, and gamma rays are the other EM radiation types that make up the electromagnetic spectrum.
Contrary to popular belief, you are more familiar with the electromagnetic spectrum. The illustration below illustrates potential daily encounters with each region of the EM spectrum.
Therefore, Radio type of electromagnetic energy is NOT part of the solar spectrum.
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