Answer:
C. Lysosome
Explanation:
Lysosmes are not commonly found in plants. They are mostly found in animal-like eukaryotes. Lysosomes have digestive enzymes that breakdown molecules like proteins, carbohydrates and the like. They also breakdown worn out organelles. When broken down, they exit the lysosomes in vesicles so that the cell can expel it. This is why lysosomes are called the garbbage disposal of the cell.
Final answer:
The organelle present only in animal cells and not in most plant cells is the c) lysosome. Lysosomes are responsible for breaking down biomolecules in animal cells, while plant cells use vacuoles for digestion.
Explanation:
The organelle found only in animal cells and not in most plant cells is c) lysosome. Lysosomes are known as the cell's "garbage disposal" where they aid the breakdown of various biomolecules. Plant cells typically perform these digestive processes in vacuoles. In contrast, chloroplasts are found in plant cells but not in animal cells, mitochondria are present in both animal and plant cells, and peroxisomes are also found in both but function differently depending on the type of cell.
What part of a neuron relays signals from one neuron to another neuron or to an effector?
Answer:
Synaptic terminal
Explanation:
Neuron or nerve cell is excitable cell of the nervous system which consists of cell body or soma (karyon), dendrites and an axon. Dendrites are short, numerous filaments responsible for the signal receiving. On the other hand, axon is long "filament" and it originates from the cell body from the swelling called axon hillock. At the end of an axon there are axon terminals (Synaptic terminals) from which neuron can transmit a signal another cell. Synaptic terminal is axonic end of presynaptic neuron.
Axons and their terminals, or synaptic terminals, are the parts of a neuron that relay signals to another neuron or an effector. They accomplish this through the release of neurotransmitters into a synaptic gap which can then bind to the next cell, transmitting the signal.
Explanation:The part of a neuron that relays signals to another neuron or to an effector is the axon and its terminal, also known as the synaptic terminal. The signals are sent across a gap called a synapse, which lies between the axon terminal of one neuron and the dendrites of another neuron. The axon terminal releases neurotransmitter molecules into this gap, these molecules then bind to receptors in the next neuron or effector cell's membrane, potentially initiating a response in that cell.
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An ecologist studied the same species of deer during the summer and the winter. She noticed that during the summer, when there was plenty of food, the deer were energetic and playful. However, during winter when food was scarce, the deer moved more slowly and did not run unless they needed to escape a predator.
Answer:
The plants would not grow so they have no food
Explanation:
Its cold
Answer: To study island, it would be: food is the fuel that gives animals energy.
At what point in the female cycle would the indicated structure be prominent?
Answer:
During formation of the luteum.
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It is impossible for sperm to be functional (able to fertilize the egg) until after ________. the tail disappears they have been stored in the uterus for several days they become spermatids they undergo capacitation
Sperm undergo capacitation in order to become functional and able to fertilize an egg.
Explanation:The correct answer is they undergo capacitation.
Sperm are not initially capable of fertilizing an egg as they go through a process called capacitation, which occurs in the female reproductive tract. During capacitation, the sperm undergo various biochemical and physiological changes that enable them to become functional and able to fertilize the egg.
Capacitation involves the removal of certain proteins and the modification of the sperm's plasma membrane, allowing it to acquire the ability to penetrate and fertilize the egg. This process usually takes several hours to occur.
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Why is lily walking in the woods, counting how long it takes her to see a bird land in a tree?
Lily, or Sylvia in the text, is in the woods engaging in a deeper experience, possibly a personal quest or fulfilling a task, where birds and their nests play a significant narrative role.
It appears that Lily (or Sylvia, as per your reference) is not simply walking in the woods to see how long it takes to spot a bird landing in a tree, but rather she's engaged in a more complex, meaningful experience. This activity might be connected to a rite of passage, self-discovery, or a connection with nature. The references you provided suggest a narrative where the protagonist undertakes a quest or challenge, possibly to satisfy personal curiosity or to fulfill a task set by or for a stranger.
Within these moments, birds and their nests become significant elements of the storyline, revealing secrets or contributing to the character's understanding of the environment and potentially her own place within it.
Which of these is a valid argument on why we should not rely heavily on GMOs in agriculture? A) GMO crops are more expensive to produce and buy. Eliminate B) GMOs have reduced nutritional value compared to traditional crops. C) there is not enough research on long-term effects of consuming GMOs. D) GMO crops become invasive and take over the habitat of indigenous crops.
The answer is C.) There is not enough research on long-term effects of consuming GMOs
Answer:
D) GMO crops become invasive and take over the habitat of indigenous crops.
Explanation:
A "Genetically Modified Organism (OMG)" is any organism whose genetic material (DNA) has been modified in a way that does not occur naturally. Over 95% of all commercially grown transgenic plants belong to four species: soybean, corn, cotton, rapeseed and rice. While there are many advantages to using OMGs in agriculture, there are also disadvantages that have caused many controversies about this technology around the world.
One of the disadvantages that can be cited is that OMG crops can become evasive and take over indigenous and family acriculture land.
This is because whenever there is genetic contamination of conventional crops by transgenic pollen grains, these crops become transgenic and the companies responsible for the manufacture of transgenic seeds have the 'right' to own agricultural land (often indigenous land). because now it became his seeds that constituted the agricultural fields, and the owner, in addition to being without his crops, is still liable to pay compensation for having 'used' seeds that were not his own.
What would happen if the capsular hydrostatic pressure were increased above normal?A) Net filtration would increase above normal.B) Net filtration would decrease.C) Filtration would increase in proportion to the increase in capsular pressure.D) Capsular osmotic pressure would compensate so that filtration would not change.
Answer:
A
Explanation:
In this biosphere cycles can be very complex and interdependent. No cycle happens in isolation. True or false
Answer:
True
Explanation:
The cycles in all of the spheres of the Earth are interdependent and very complex, and the biosphere is not an exception. The cycles that take part in the biosphere also take part in the other spheres. The influences of all spheres is equally important for the natural cycles to be performed, and if only one of them is lacking, then the cycle will not be able to continue, causing a lot of changes all over the planet because of it.
The recycling truck comes every Friday to gather what has been put into the trash cans. This is similar to _______ in eukaryotic cells. A. cytoplasm B. chromatids C. lysosomes D. Golgi apparatus
Answer:
It is lysosomes
Explanation:
Cells rely on a few different garbage disposal systems to stay neat and ... Once a protein has the ubiquitin label, the proteasome can grab it, put it inside the ... Cells also have to recycle compartments called organelles when ... rely on an organelle called the lysosome, which works like a cellular stomach.
C. Lysosomes. Lysosomes carry waste out the cell, like trash trucks taking trash from houses
"which drug name is correctly paired with its general category of drugs?"
a. morphine—hallucinogen
b. morphine—stimulant
c. valium—benzodiazepine
d. valium—barbiturate
C. Valium is a benzodiazepine
Answer:
The correct answer is option c. valium—benzodiazepine.
Explanation:
Valium is categorized into benzodiazepines, and contains diazepam as the active substance.
The effects of this drug are tranquilizers, sedatives, muscle relaxants and anticonvulsants, and is consumed by those patients who present with symptoms of anxiety, insomnia or some type of psychoneurotic disorder.
In the category of benzodiazepines are all those drugs that act directly on the central nervous system.
It is also a drug widely used to treat those people who suffer from anxiety for having consumed an excess of hallucinogens.
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Methane hydrates are kept in sediments deep in the ocean by the cold temperature and high pressure. Some scientists are concerned that there could be a release of immense amounts of natural gas contained in methane hydrates. Why are climate scientists concerned about this?
Methane is a greenhouse gas, so its release would likely increase global warming.
Methane is toxic to marine organisms and would damage the ecosystem if released by killing species.
This would lead to massive pollution of drinking water.
We want to extract and use this gas as a fuel source, but it would be lost to the environment through this process.
Greenhouse, it’s release would most definitely increase global warming chances by a major amount.
Methane is a potent greenhouse gas, so its release would likely increase global warming.Therefore, option (A) is correct.
What are greenhouse gases?Greenhouse gases are gases that trap heat in the Earth's atmosphere and contribute to the greenhouse effect, which is the warming of the Earth's surface temperature. Methane is a powerful greenhouse gas, with a warming potential 28 times greater than carbon dioxide over a 100-year time frame.
It is produced through natural processes such as decomposition of organic matter, but it is also emitted as a result of human activities such as livestock farming, natural gas production and transport, and waste management. Methane emissions contribute significantly to climate change, and reducing methane emissions is an important strategy for mitigating the impacts of climate change.
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what condition absolutely must be present in a population before evolution can act upon it ?
what condition absolutely must be present in a population before evolution can act upon it ?
Answer:Genetic variation
Genetic variation is the condition that must be present in a population for evolution to act upon it. This variation leads to evolutionary forces such as natural selection, mutation, migration, and drift, driving the genetic change in populations.
Explanation:The condition that absolutely must be present in a population before evolution can act upon it is genetic variation. This variation, or differences, among individuals in a population must have some genetic basis; otherwise, the selection will not lead to change in the next generation. Even Hardy and Weinberg recognized that no natural population is immune to evolution. Populations in nature are constantly changing in genetic makeup due to drift, mutation, possibly migration, and selection.
Evolution by natural selection arises from three conditions: individuals within a species vary, some of those variations are heritable, and organisms have more offspring than resources can support. This leads to advantageous traits being passed on to offspring in greater proportion, and the trait will have higher representation in the next and subsequent generations leading to genetic change in the population. The Hardy-Weinberg principle provides a mathematical baseline of a non-evolving population, allowing for comparisons and inferences about evolutionary forces.
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Which of the following models presents a species relationship as it would typically be drawn within a food web? Vertical model. From top to bottom: an oval with the label rabbit, a down arrow, an oval with the label fox. Vertical model. From top to bottom: an oval with the label fox, a down arrow, an oval with the label rabbit. Vertical model. From bottom to top: an oval with the label rabbit, an up arrow, an oval with the label fox. Vertical model. From bottom to top: an oval with the label fox, an up arrow, an oval with the label rabbit.
Final answer:
The correct food web model shows a predator like a fox above its prey, a rabbit because arrows in a food web indicate the direction of energy flow from the eaten to the eater.
Explanation:
The model that presents a species relationship as it would typically be drawn within a food web is the Vertical model. From top to bottom, you would have a predator such as a fox, shown with a down arrow to a prey species such as a rabbit. This is because, in a food web, arrows represent the flow of energy from the organism being eaten to the organism that does the eating. Therefore, the correct sequence within a food web is the second option: Vertical model. From top to bottom: an oval with the label fox, a down arrow, an oval with the label rabbit.
What type of blood capillary located in this sublayer is uniquely suited for absorption of nutrient material?
Answer:
Fenestrated capillaries
Explanation:
Fenestrated capillaries are found in some tissues where there is extensive molecular exchange with the blood such as the small intestine, endocrine glands and the kidney.
Ants carry dead ants out of an anthill and dump them on a trash pile. To study this behavior, a scientist paints a live ant with a chemical from dead ants. The scientist observes that the other ants repeatedly carry the live ant, which is kicking and struggling, to the trash pile, until the chemical wears off. What do these observations suggest?A. The chemical is a stimulus that triggers an innate behavior.B. The process of carrying a live ant to the trash pile is an example of problem solving.C. The ants have become imprinted on the chemical.D. The ants have learned through the experiment to associate the chemical with dead ants.
I think the answer is B but if not it’s A
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How does the number of chromosomes in a daughter cell compare to the number of chromosomes in a parent cell?
Question options:
The daughter cell has one-half the number of chromosomes.
The daughter cell has twice the number of chromosomes.
The daughter cell has one-fourth the number of chromosomes.
The daughter cell has the exact same number of chromosomes.
the answer is the first option
' the daughter cell has one half the number of chromosomes of the parent cell'
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Which two factors would a biologist need to know to identify an ecosystem?
A the biotic and abiotic factors
B the plants and animals in the area
C the weather and climate in the area
D the population and individuals that live then
Which organism holds the largest amount of energy in a most ecosystem?
A the biotic and abiotic factors
B the plants and animals in the area
C the weather and climate in the area
D the population and individuals
Answer:B D
Explanation:
i just had a test and got both right
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Global warming has resulted in weather extremes. One such extreme is a general increase in the intensity of winter storms and a decrease in average winter temperatures. Discuss how the worsening of winter conditions in the Southern United States may alter the long-term behavior of a population of birds that depend on mild winters for food and reproduction.
The more extreme winter storms in the Southern United States will result in change of behavior or migration of the animals that live there. The reason for that is that the animals, in this case the birds, will not be able to get to enough food, so they will have to move to a region that will provide enough food for them to survive. These birds are used to mild winters and sufficient amount of food, but the more extreme winter conditions bring in temperatures that are not suitable for the birds, and on top of that the food sources will be damaged. This will force the birds to migrate further south, toward Mexico or Central America where the winter conditions would be much better for the birds and they will be able to sustain their populations.
How is a species added to the endangered species list
Answer:
When there is a huge influence of factor (or more factors) that affect the survival of the species.
Explanation:
List of Endangered and Threatened species is a list of living organisms that need protection.
endangered means it the species is in danger of extinctionthreatened means that the species is in the stadium before becoming endangeredFactors that affect the survival of the species are:
destruction or modification of their habitat (usually under the influence of human activity)diseasehigh predation influence overutilization of an animal or plant (for comercial, educational or other purposes)natural disasters etc.Water can leave the air as a result of which processes? A. infiltration or transpiration B. precipitation or evaporation C. evaporation or transpiration D. condensation or precipitation
Answer:
D
Explanation:
The water in the air is in its gas form. The act of evaporation is water in its liquid form turning into gas. Condensation and precipitation both are acts of water in its gas form turning back into its liquid form.
Answer:
The correct answer is: D) condensation or precipitation.
Explanation:
Condensation refers to the change in the state of water, from the gas phase into the liquid phase - making it the opposite of evaporation.
Precipitation is basically any product of the condensation of atmospheric water that falls under gravity. For precipitation to happen, the atmosphere must become saturated with water vapor.
Water in the air is normally in the gaseous phase and, in order to descend, it needs to go to the liquid state (rain).
Explain why it is necessary to use the same restriction enzyme to cut the desired gene from the source and to cut the plasmid. Include a drawing or diagram in your answer.
Answer:
It is necessary because of the base pairing between the desired gene and plasmid
Explanation:
Restriction enzymes are enzymes that recognize the specific DNA sequence-restriction site, double-stranded cut DNA and produce ends with a single-stranded overhang. The overhangs of the plasmid can stick together with overhangs of gene of interest by complementary base pairing. Joining of ovarhangs is done by the enzyme DNA ligase.
Most populations demonstrate _____ growth, in which the population size increases exponentially until it levels off near the k value of the habitat for that species. intrinsic logarithmic logistic exponential extrinsic
Exponential growth then logistic growth as it levels off due to carrying capacity
Summation that results from the cumulative effect of multiple synapses at multiple places on the neuron is designatedimpulse transmission.spatial summation.inhibition of the impulse.hyperpolarization.temporal summation.
Answer:
spatial summation
Explanation:
There are two types of neuron summation:
temporal-multiple repeated signals (target neuron receives a single form one neuron that is repeated)spatial-multiple simultaneous signals from multiple synapses (target neuron receives few different inputs).Since the signals might be excitatory (produce depolarization of the postsynaptic cell) or inhibitory (produce hyperpolarization) of the postsynaptic cell, their total sum might or might not trigger an action potential on neuron.
Spatial summation is the cumulative effect of multiple synapses at multiple places on a neuron, which can potentially initiate an action potential. Temporal summation refers to multiple inputs at the same place over time. Both types of summation can influence a neuron's signal transmission.
Explanation:The cumulative effect of multiple synapses at multiple places on a neuron is referred to as spatial summation. This is where signal inputs at different locations on a neuron add together, potentially initiating an action potential that is strong enough to be transmitted. The membrane potential itself is a balance of positive and negative charges across the neuron's cell membrane. If the excitatory potentials overcome the inhibitory ones and reach a certain threshold, an action potential is fired.
On the other hand, temporal summation refers to multiple inputs that occur at the same place but are spread out over time. Both spatial and temporal summation can work together to influence the neuron's signal transmission.
Lastly, there's the concept of a synapse, a small gap where neurotransmitter molecules are released by one neuron and received by another, and this helps signal transmission between neurons. A key area where summation occurs is the axon hillock, a place where synaptic end bulbs release neurotransmitters onto a target cell across a synaptic cleft.
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Describe two applications of transgenic organisms
A genetically modified organism (GMO) is any organism whose genetic material has been altered using genetic engineering techniques. The exact definition of a genetically modified organism and what constitutes genetic engineering varies, with the most common being an organism altered in a way that "does not occur naturally by mating and/or natural recombination". A wide variety of organisms have been genetically modified (GM), from animals to plants and microorganisms. Genes have been transferred within the same species, across species (creating transgenic organisms) and even across kingdoms. New genes can be introduced, or endogenous genes can be enhanced, altered or knocked out.
Cells that are specialized
A)are less complex.
B)perform different functions for the organism.
C)reproduce.
D)are stem cells.
Answer:
perform different functions for the organism
During winter, the pigment-producing genes of the arctic fox and other arctic animals do not function and the result is a white coat. This is an example of ___________ change due to environmental influence.
Answer:
chamouflage
Explanation:
Answer: phenotypic
Explanation: phenotypic changes result from environmental variation in many animal or plant species
Control of thirst response due to increased plasma osmolarity by a negative feedback loop rank from the first to the last steps to describe the correct order of events to maintain homeostasis.
Thirst response is controlled by the master of all endocrine gland i.e. the hypothalamus. The increase in the osmolarity of the cells causes the hypothalamus to trigger the thirst response. This is subsidized by fluid intake which helps in operating the feedback loop.
Further Explanation:
Feedback mechanism is the process by which the body tries to maintain a homeostasis. They are of two types,
a. Positive Feedback Loop
b. Negative Feedback Loop
Positive feedback loop is the self-regulating process in which the increase in input decreases the output. A sufficient decrease in the output leads to decrease in input.
Negative feedback loop is a self-regulating cycle in which the increase in input increases the output. The increase in output regulates the level of input.
Hypothalamus is the master endocrine gland that plays a vital role in maintaining homeostasis that is a stable condition inside the body.
The control of thirst response is carried out in the following manner,
i. The increase in osmoregularity of the cells.
ii. This increase is detected by the control center in the brain i.e. hypothalamus.
iii. Hypothalamus triggers the thirst response.
iv. The triggering helps in increasing the fluid intake.
v. The fluid intake is detected and the osmoregularity comes back to normal.
vi. The hypothalamus detects the change in osmoregularity.
vii. The change detected leads to decrease in thirst response.
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Answer Details:
Grade: College biology
Subject: Biology
Chapter: Homeostasis
Keywords:
Homeostasis, hypothalamus, fluid, Fluid intake, Brain, master endocrine gland, feedback mechanism, negative feedback loop, feedback loop, endocrine gland.
Final answer:
The control of thirst response due to increased plasma osmolarity is maintained by a negative feedback loop involving osmoreceptors signaling the hypothalamus to induce thirst and release ADH, leading to increased water reabsorption by the kidneys until homeostasis is restored. The correct order of events is: detection of increased plasma osmolarity, activation of osmoreceptors in the hypothalamus, thirst response and drinking water, release of antidiuretic hormone to recover water from urine, and decrease in watery output from salivary glands.
Explanation:
The body detects an increase in plasma osmolarity due to dehydration.The osmoreceptors in the thirst center of the hypothalamus monitor the concentration of solutes in the blood.If the blood osmolality increases above its ideal value, the hypothalamus signals thirst and the person responds by drinking water.The hypothalamus also releases antidiuretic hormone (ADH) through the posterior pituitary gland, which signals the kidneys to recover water from urine, diluting the blood plasma.To conserve water, the hypothalamus sends signals to the salivary glands, resulting in a decrease in watery output and an increase in stickier mucus output, causing a dry mouth and the sensation of thirst.This process efficiently regulates water intake and urine production to ensure that the body's plasma osmolarity remains within the optimal range.
Which of the following pairs are the best examples of homologous structures?(a) bat wing and human hand(b) owl wing and hornet wing(c) porcupine quill and cactus spine(d) bat forelimb and bird wing(e) Australian mole and North American mole
Answer:
(a) bat wing and human hand
Explanation:
The homologous structures are structures at living organisms that are the same, very similar, or have the same function, despite the organisms having different appearance. This can mostly be seen in the bones of the animals, and this type of structures more often then not suggest a distant common ancestor between the species. Usually the homologous structures appear among animals from the same class, so it can be expected that animals from the mammalia class can have these structures, or animals from the reptilia etc. In this case we have the bat wing and the human hand. Both have similar bone structure, and the function of the bones in the bat wing and the human hand is also similar. Both of them are in the class of mammalia, and they do share a very distant common ancestor in the small shrew-like mammals during the reign of the dinosaurs.
Which of the following options best depicts the flow of information when a gene directs the synthesis of a cellular component? A) RNA → DNA → RNA → protein B) DNA → RNA → protein C) protein → RNA → DNA D) DNA → amino acid → RNA → protein E) DNA → tRNA → mRNA → protein
When a gene directs the synthesis of a cellular component, the information flow typically follows the path DNA → RNA → protein, as per the Central Dogma of molecular biology. In this process, DNA is first transcribed into mRNA, which is then translated into a specific protein.
Explanation:The flow of genetic information in a cell, often referred to as the Central Dogma, typically follows the path DNA → RNA → protein. This path is crucial in the synthesis of a cellular component led by a gene. Here's how it works: First, during the process of transcription, a section of DNA, which constitutes a gene, is transcribed into RNA, specifically messenger RNA (mRNA). Then, this mRNA is translated into a specific protein in a process called translation.
So, the answer to the question 'Which of the following options best depicts the flow of information when a gene directs the synthesis of a cellular component?' is B) DNA → RNA → protein.
Each mRNA codon, or group of three nucleotides, corresponds to a specific amino acid, which building block of proteins. Importantly, this process of information flow from DNA to RNA to protein is universal among organisms.
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Someone who fosters an individual's development by believing in the person, sharing the person's dreams, and helping the person achieve those dreams; a role model that helps the individual get started in adult life.
Answer:A
Explanation: