Answer:
Elastomeric
Explanation:
An elastomer is a polymer whose main characteristic is elasticity and can even recover its shape after being deformed
The chemical composition of an elastomer is the grouping of thousands of molecules called monomers, which join together forming huge chains. These large chains of polymers are those that give elasticity since they are flexible and are intertwined in a very messy way.
When an elastomer is stretched, its molecules align, allowing many times to take a crystalline appearance. However, upon releasing the tension, it immediately returns to its original state of elastic disorder. The above distinguishes elastomers from plastic polymers.
Liver cells are exposed to radioactive amino acids; all proteins synthesized during this time are radioactive. The cells are then re moved at 5-minute intervals and fractionated. Where in the cells is the radioactively labeled enzyme lipase performing its intracellular functions?
A. In lysosomes
B. On ribosomes
C. In the cytoskeleton
D. In the endoplasmic reticulum
E. In the Golgi I know that the answer is in the ER, but why wouldn't it be in the ribosomes if that is where proteins are synthesized.
Answer: The Radioactively labeled enzyme, lipase performs its function in the endoplasmic reticulum
Explanation:
Lipase is found in the Endoplasmic reticulum (ER), because
- it helps in the breakdown of lipids into fatty acids, and the ER is an organelle of liver cell, known to aid the intracellular transport of materials within the cytoplasm.
Therefore, since lipid stored or transported into liver will be distributed by ER, the radioactive Lipase is usually present to breakdown the lipids for easy transport and usage by other cell organelles.
Answer: in the endoplasmic reticulum
Explanation:
Assume that a black guinea pig crossed with an albino guinea pig produced 5 black offspring. When the albino was crossed with a second black guinea pig, 4 black and 3 albino offspring were produced. What genetic explanation would apply to these data?
A) Both albino and black= recessive
B) Albino= dominant, black= incompletely dominant
C) Albino and black= codominant
D) Albino= recessive, black= dominant
E) None of the above
Answer:
The correct answer is option D) Albino = recessive, black = dominant.
Explanation:
According to Mendel's Law of Dominance, of the two alleles which represent a gene, one can express itself even when in the presence of the other allele, that is in heterozygous state. This is called the Dominant allele. The other allele can express itself only in homozygous state. This is called the Recessive Allele.When a black guinea pig is crossed with an albino guinea pig, all black offspring (5) are obtained in the F1 generation.This indicates that the Black colour is dominant over the albino colour, as it masks the expressions of the albino phenotype.This also indicates that the genotype of the parent black guinea pig is homozygous dominant, as if it would have been heterozygous dominant then in the F1 generation there was a chance of formation of both black and albino offspring in 1 : 1 ratio.When a black guinea pig from the F1 generation is crossed with the albino guinea pig it gives both black (4) and albino (3) guinea pigs, roughly in the 1 : 1 ratio.This indicates that black guinea pig from the F1 generation was heterozygous dominant. This is why the recessive allele giving rise to the albino phenotype could express itself in the second cross.The second cross between F1 offspring and recessive parent is called the Test Cross.Which function is NOT a property of life? Which function is NOT a property of life?
1. Populations of organisms rarely change over time.
2. Living things exhibit complex but ordered organization.
3. Organisms reproduce their own kind.
4. Organisms take in energy and use it to perform all of life's activities.
Answer:
The correct answer is-1. Populations of organisms rarely change over time.
Explanation:
Life shows several characteristics or properties like- responsiveness, growth, and development, response to environment, homeostasis, reproduction, order, and metabolism.
So ordered organization, reproduction, and intake of energy is the property of life but population rarely change over time is not a property of life because population of organism changes over time due to genetic variation they get through mutation and reproduction.
This property is important for life to evolve with the changing environment and survive in adverse conditions.
The statement that "Populations of organisms rarely change over time" is not a property of life.
WHAT ARE THE PROPERTIES OF LIFE:
The properties or characteristics are the features that an entity must possess to be considered living. They include:Organization: Living things must exhibit a coordinated organization i.e. cells to tissues, tissues to organs and so on...Sensitivity: Living things respond to internal and external stimuli. Reproduction: Living things have the ability to replicate themselves and produce their own kind. Respiration: living organisms can obtain energy from food and use it to perform their metabolic activities. Growth: Living things increase in size.Based on the properties that defines life, the statement that populations of organisms rarely change over time is not one of them.
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a biologist thinks that over time a parasite can influence the evolution of its host species. do you think she is right? justify your answer.
Answer:
She's right
Explanation:
A parasite is an organism that lives in or on an organism of another species (its host) and benefits by deriving nutrients at the other's expense.
A parasite depends on its host for survival and rarely kills its host. Parasites are usually smaller than its host.
However, over time, parasites can influence the evolution of its host species as a consequence of its effect on the hosts' nutrition.
Certain hosts may depend on that particular nutrition for a number of functions which may include reproductive, behavioral, social and its overall health. When there is an alteration in any of these functions, for example, reproductive function, the host is affected. Over time an evolutionary change have to occur to protect the hosts' species.
Some parasites tend to reduce the overall health of the hosts which in turn tend to make their hosts prey to predators. For example, infected antelopes might not be fast enough to evade lions, or infected lions might not be fast enough to catch antelopes. Depending on the frequency of the infection, overtime, an evolutionary change would happen.
Final answer:
Yes, a parasite can influence the evolution of its host species through co-evolutionary arms races, where both must continually adapt to survive. This dynamic results in changes in genetic diversity and selective pressures on both the parasite and the host.
Explanation:
The Red Queen Hypothesis aptly captures the concept that species must continually adapt to survive in the face of evolving threats, such as parasites. Biologists assert that parasites can indeed influence the evolution of their host species. As hosts evolve to resist parasitic infections, parasites must similarly evolve to overcome their hosts' defenses, leading to co-evolutionary arms races where neither species can afford to stop progressing without facing possible extinction. The evolution of parasites and their interactions with hosts create varying selection pressures, necessitating continual adaptation within host species in order to maintain a balance in survival and reproduction; hence supporting the Red Queen's idea, "It takes all the running you can do to stay in the same place."
Empirical studies have attempted to understand how these dynamics play out in real-world scenarios, often examining the genetic diversity in host and parasite populations. While some research highlights instances where host-parasite interactions have led to reductions in genetic diversity, other studies find that these same interactions necessitate and drive genetic variations within species. This underlines the importance of genetic diversity as a survival strategy, confirming the notion that a parasite can certainly impact the evolutionary course of its host.
Before the evolution of complex nervous systems, animals with very simple nervous systems, such as the nerve nets of cnidarians, could engage in all of the behaviors except __________
Answer:
FINDING A MATE
Explanation:Cndarians are about 11000 species of animals found living in water( they are aquatic animals). The body of Cnidarians are divided into two (2) layers called EXODERM AND ENDODERM separated by MESOGLEA( a jelly-like material, Cndarians have tentacles which they can use to Sting Invaders or predators. Cnidarians are known to have Nerve nets which help them to transfer stimuli or certain nutrients but are never used to search for mates.
A young boy is staring at the tropical fish tank in his mother's office. He reaches in and pulls out a fern-like plant. When he closely examines this plant, he notices it has very large cells with several dark spots. What is likely true of this plant?a. This is likely an example of a simple multicellular fungi.
b. It is coenocytic―the dark spots in the cells are actually nuclei.
c. Given the tropical environment, this plant is likely an example of Caulerpa.
d. Given the tropical environment, this plant is likely an example of Codium.
e. This plant is coenocytic (the dark spots are actually nuclei) and―given the tropical environment―is likely an example of Caulerpa.
Answer:
This is an example of " This plant is coenocytic (the dark spots are actually nuclei) and―given the tropical environment―is likely an example of Caulerpa"
Explanation:
Here, the plant is referred as the coenocyte because of the presence of multinucleate cells, which occurs due to the multiple nuclear division without undergoing cytokinensis. This happens because of the cellular accumulation after the disintegration of the cell membranes present beneath the mass. On the other hand, caulerpa is the phenomenon in which lot of nuclei are present inside one cell. This makes the biggest single cell of the world.
In human cells, this organelle houses 23 pairs of chromosomes which contain genes made from DNA; in each chromosome pair, one is inherited from mom and the other is from dad.
Answer:
Nucleus
Explanation:
Humans are eukaryotic organisms. Their cells have a well-defined nucleus in which the genetic material is present in the form of chromosomes. Chromosomes have genes arranged in a linear manner. Genes represent the stretch of DNA that code for a specific protein. Being diploid organisms, humans have two complete sets of chromosomes. Therefore, each chromosome is present in pairs. These pairs are called homologous chromosomes. One chromosome of a pair comes from an egg cell and is called the maternal chromosome. The other chromosome is contributed by sperm and is called a paternal chromosome.
The majority of solutes that diffuse across the plasma membrane cannot move directly through the lipid bilayer. The passive movement of such solutes (down their concentration gradients without the input of cellular energy) requires the presence of specific transport proteins, either channels or carrier proteins. Diffusion through a transport protein in the plasma membrane is called facilitated diffusion. True or false?
Answer:
True
Explanation:
The plasma membrane does not allow the charged and polar substances to cross through its inner core that is made up of non-polar fatty acid tails of the phospholipids. Therefore, membrane proteins serve as transport proteins. Some of the transport proteins allow the movement of substances down the concentration gradient without any energy input. This passive movement of substances via membrane transport proteins is called facilitated diffusion.
Carriers and channels are the membrane proteins that facilitate the diffusion of substances. Carrier proteins pick the substances from one side of the membrane and undergo a change in shape to deliver the substance on the other side. Channel proteins make a passage for the movement of substances. Examples: aquaporins, ion channels.
The statement is true. The majority of solutes cannot move through the plasma membrane because of their size or polarity. Therefore, they require the help of transport proteins to cross the plasma membrane, a process known as facilitated diffusion.
Explanation:
The statement that the majority of solutes that diffuse across the plasma membrane cannot move directly through the lipid bilayer is true. These solutes require the presence of specific transport proteins, such as channels or carrier proteins. Diffusion through these transport proteins is called facilitated diffusion.
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Many songbirds breed in North America in the spring and summer, and then migrate to Central and South America in the fall. They spend the winter in these warmer areas where they feed and prepare for the spring migration north and another breeding season. Two hypothetical species of sparrow. A and B. overwinter together in mixed flocks in Costa Rica. In spring. species A goes to the east coast of North America, and species B goes to the west coast. What can you say about the isolating mechanisms of these two species? A) They must have strong postzygotic isolating mechanisms to spend winter in such close proximity B) They must have strong prezygotic isolating mechanisms to spend winter in such close proximity. C) These two species mate in different climates. D) Reinforcement must be occurring when they winter together.
Answer:
C. These two species mate in different climates.
Explanation:
Many songbirds breed in North America in the spring and summer, and then migrate to Central and South America in the fall. They spend the winter in these warmer areas where they feed and prepare for the spring migration north and another breeding season. Two hypothetical species of sparrow. A and B. overwinter together in mixed flocks in Costa Rica. In spring. species A goes to the east coast of North America, and species B goes to the west coast. What can you say about the isolating mechanisms of these two species?
It is visible that the species, their winter habitat has no bearing on their degree of reproductive isolation. One of the characteristics of living organism is ADAPTATION. They are adapted to different region during mating period.
The answer is not A, neither do they have a strong prezygotic isolating mechanism,
they do not have reinforcement must be occurring when they winter together
C is the answer
Final answer:
The two hypothetical species of sparrows, A and B, likely have strong prezygotic isolating mechanisms since they overwinter together but breed in separate geographic locations, preventing interbreeding despite their proximity in the winter. Option B is the correct answer.
Explanation:
The question concerns the isolating mechanisms that would prevent the two hypothetical species of sparrows, A and B, from interbreeding despite overwintering together in mixed flocks in Costa Rica. In this scenario, it is suggested that the sparrows must have strong prezygotic isolating mechanisms to spend winter in such close proximity without interbreeding (option B). Prezygotic isolating mechanisms prevent species from mating or ensure that if mating occurs, no fertilization happens. Such mechanisms could include differences in mating rituals, mating calls, timing of reproductive cycles, or physical incompatibility for mating. Since these sparrows migrate to different regions during the breeding season, geographic separation also functions as a prezygotic barrier.
A physiology instructor asks the students about the purpose of the promoter region on a DNA strand. Which student response is most accurate?
Answer:
Contains amino acids that the RNA polymerase recognized and binds to, thus starting the replication process.
Explanation:
The promoter region of a DNA is where initiation of transcription of a gene takes place.
This happens when RNA polymerases and other vital transcriptional factors bind to the promoter sequence and initiate transcription. Promoters are typically located up stream (5' end) of the transcription initiation site and the promoter sequences define direction of transcription.
The TATA box is the conserved Promoter sequence in most eukaryotes.
The ABO and MN blood-type frequencies of the Dunkers differ significantly from those of current American and German populations due to:________ a) gene flow. b) mutation. c) natural selection. d) genetic drift.
Answer:
d) genetic drift
Explanation:
The ABO and MN blood-type frequencies of the Dunkers differ significantly from those of current American and German populations due to Genetic Drift. This term refers to variation in the relative frequency of the different genotypes that may exist within a small population, which results in the extinction of different genes as individuals die without reproducing.
Gametes are _______ so that when fertilization occurs, the resulting zygote will have the characteristic number of chromosomes for that species.
Answer:
Haploid
Explanation:
Gametes are mainly produced by the process of meiosis in the gamete mother cells. Meiosis reduces the chromosome number to the half in the gametes and produces haploid gametes. Haploid cells are the ones that have only one complete set of chromosomes. The fusion of haploid male gamete with a haploid female gamete restores the diploid chromosome number in the zygote.
For example, each of the human sperms and egg cells has 23 chromosomes. Somatic cells in humans have 46 chromosomes. The fusion of a sperm carrying 23 chromosomes with an egg having 23 chromosomes restores the 46 chromosomes in the zygote.
The second law of thermodynamics states that __________.
a) the total energy in the universe is increasing with time
b) all of the food energy eaten by an organism can be used by that organism
c) in any transformation, some of the original energy is converted to heat or light and the system becomes more disordered
d) the energy in the universe is constant
Answer: Option (c) is the correct answer.
Explanation:
According to the second law of thermodynamics, there will always be increase in entropy of the Universe.
And, entropy is the degree of randomness or disorderness. This means that more is the movement of particles of a system more will be the entropy of system.
During this process, some of the energy is lost in the form of heat or light due to which the system becomes more disordered in nature.
Thus, we can conclude that the second law of thermodynamics states that in any transformation, some of the original energy is converted to heat or light and the system becomes more disordered.
The second law of thermodynamics states that in any transformation, some of the original energy is converted to heat or light and the system becomes more disordered.
The second law of thermodynamics states that in any transformation, some of the original energy is converted to heat or light and the system becomes more disordered. This law is often referred to as the law of entropy. It explains that in any process, the total entropy of an isolated system will always increase or remain the same but never decrease.
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A student groups different types of cells as shown
Answer:
this question needs more information
According to the Lab Safety Sheet provided for this week, which of the following is a potential hazard you will face in the b-galactosidase assay lab? (Check all that apply)Select one or more:
a. Water reactive chemicals
b. Corrosive chemicals
c. Chemicals causing respiratory tract, eye and skin irritation
d. Potentially carcinogenic chemicals
e. Radioactive materials
Answer:
Chemicals causing respiratory tract, eye and skin irritation.
Potential Carcinogenic chemicals
Explanation:
b-galactosidase is an enzyme encoded by Lac Z gene of the lac operon in E. coli. It hydrolyses b-galactosides and lactose into monosaccharides which are simple sugars
In order to carry out this assay, materials including b-mercaptoethanol and ONPG(o-nitrophenyl-b-d-galactopyranoside) are used.
b-Mercaptoethanol produces vapors which can cause respiratory tract irritation if inhaled and ONPG is a potential carcinogenic chemical.
In the b-galactosidase assay lab, potential hazards include corrosive chemicals, chemicals causing respiratory tract, eye and skin irritation, and potentially carcinogenic chemicals.
Explanation:In the b-galactosidase assay lab, potential hazards you may face include:
Corrosive chemicals: These can burn your skin and eyes, causing harm.Chemicals causing respiratory tract, eye and skin irritation: Some chemicals used in the lab can cause irritation to your respiratory tract, eyes, and skin.Potentially carcinogenic chemicals: There may be chemicals in the lab that have the potential to cause cancer.What kind of speciation has occurred in this example, and what has driven it? Beetle pollinators of a particular plant are attracted to its flowers bright orange color. The beetles not only pollinate the flowers, but they mate while inside of the flowers. A mutant version of the plant with red flowers becomes more common with the passage of time. A particular variant of the beetle prefers the red flowers to the orange flowers. Over time, these two beetle variants diverge from each other to such an extent that interbreeding is no longer possible.
A. Allopatric speciation, ecological isolation
B. Sympatric speciation, habitat differentiation
C. Allopatric speciation, behavioral isolation
D. Sympatric speciation, sexual selection
E. Sympatric speciation, allopolyploidy
Answer:
B. Sympatric speciation, habitat differentiation
Explanation:
In the given example, no geographical barrier has been operational to isolate the two populations of the beetles so as to prevent interbreeding between them. On the other hand, the two variants are present together while developing isolating reproductively from each other. Therefore, it represents sympatric speciation.
The two variants mate inside the flowers of different colors. Since their mating sites are different colored flowers, they are not able to interbreed. This represents habitat differentiation as the one variants of beetle reproduce inside orange the colored flowers while the other inside the red-colored flowers. They develop a tendency to reproduce inside the different habitats (a habitat is a region where an organism lives and reproduces).
What is apoptosis? A. The proliferation of cytotoxic T-cells. B. The receptor on a cytotoxic T-cell that recognizes MHC molecules. C. The process of programmed cell death. D. A protein molecule that forms a pore in the membranes of infected cells.
Answer:
Option-C
Explanation:
Apoptosis is a genetically controlled process taking place in the multicellular organisms which is marked with the self-destruction called or programmed cell death.
During apoptosis various physiological and morphological changes take place in the cell such as fragmentation of nuclear DNA, nucleus, shrinkage of cell and mRNA decay.
Since apoptotic cell undergoes cell death which is genetically controlled or programmed by the genes, therefore, apoptosis is known as the programmed cell death.
Thus, Option-C is the correct answer.
While reviewing the basic information related to hemodialysis, the professor explains that water molecules move through adjacent phospholipid molecules in the cell membrane by:
Answer: Diffusion and osmosis
Explanation:
Water, like many molecules, wants to be at equilibrium; it wants to have an equal concentration on either side of the membrane. The movement of water across a membrane to reach equilibrium is called osmosis. Water molecules move through the phospholipid molecules in the cell membrane by osmosis.
Osmosis is a process through which the molecules pass through a semipermeable membrane across a concentration gradient. Water molecules pass from high concentration to low concentration.
Benoit is interested in studying the effects of various biological forces on human development. Which topic is probably of LEAST interest to Benoit?
Answer:
COGNITION
Explanation:
The four basic forces of development are biological, psychological, sociocultural, and life-cycle.
Cognition is a topic under psychological force of development. Since Benoit is interested in studying the effects of various biological forces on human development, COGNITION will probably be of LEAST interest to Benoit.
Cognitive biology says that every organism—be it a single cell or multicellular—is continuously involved in systematic process of cognition combined with intentional behaviors. It as to do with an organism ability to sense stimuli in its environment and act in response to it, it is cognitive.
In a one-to-many binary relationship, the primary key from the "many side" of the relationship is inserted as a foreign key in the "one side" of the relationship. a) trueb) false
In a one-to-many binary relationship, the primary key from the "many side" of the relationship is inserted as a foreign key in the "one side" of the relationship. It is a false statement.
Explanation:
Two entities participate in a binary relationship. Two relations together represent a one-to-many binary relationship. In this case the first key of the relation on one side of the relationship is inserted as a foreign key into the relation on many side of the relationship.
In one-to-many relationship, a record in a specific table can be co-related with one or more records in different table.
The foreign key can be used to store one-to-one binary relationship in the social database.
The spindle forms, chromosomes condense, the nuclear envelope fragments, the nucleolus disappears, homologous chromosomes pair off, and crossing-over occurs during
Answer: Prophase 1
Explanation:
Nuclear division is about to occur, nucleolus disappear, fragmentation of the nuclear envelope takes place.
The centrosomes apart from each other and the spindle fiber assembles.
Crossing over may take place at this time by the end of which the sister chromatids are no longer identical.
All of these events takes place during the prophase 1 stage of meiosis.
Prophase I is the first stage of meiosis I in cellular division where several events occur, including chromosome condensation, nuclear envelope fragmentation, binding of homologous chromosomes, formation of chiasmata, crossing over, and the emergence of spindle fibers from centrosomes.
Explanation:Prophase I is the first stage of meiosis I in cellular division. During prophase I, several events occur:
Chromosomes condenseThe nuclear envelope fragmentsHomologous chromosomes bind firmly together along their length, forming a tetradChiasmata form between non-sister chromatidsCrossing over occurs at the chiasmataSpindle fibers emerge from the centrosomesThese events set the stage for the separation and exchange of genetic material between homologous chromosomes and the formation of new combinations of genetic material during meiosis.
Phrenologists believed that the contour of the skull could provide valuable information about a person’s brain structure and function. This was built on the assumption(s) that____________.
The question is incomplete as it does not have the options which are:
a. skull protrusions are caused by disproportionate development of the brain areas beneath them, which are responsible for different specific functions.
b. certain traits such as aggressiveness lead to life experiences and injuries that alter the shape of the skull in specific ways.
c. life experiences and injuries that alter the shape of the skull in specific ways lead to certain traits, such as aggressiveness.
d. the development of the skull bones directly influences the configuration of the soft brain areas beneath them, which are responsible for different specific functions.
Answer:
Option-A
Explanation:
Phenology refers to the study of the structure of the skull and relating it to determine the character of a person and the mental capacity.
The practice of phrenology is pseudoscience as it does not provide any scientific pieces of evidence.
There are many assumptions made in this pseudoscience like the mind is composed of multiple faculties which form organ and the development of these organs determine the shape of the skull therefore by studying the shape of the skull can help determine the psychological aptitude and character.
Thus, Option-A is the correct answer.
Phrenologists believed that the contour of the skull reflected a person's brain structure and function, but this assumption has been proven wrong. Despite being a pseudoscience, phrenology has influenced current-day neuroscience in terms of understanding the specific functions of different parts of the brain.
Explanation:Phrenologists believed that the contour of the skull could provide valuable information about a person’s brain structure and function. They assumed that bumps and indentations on the skull were correlated with specific functions of the brain. For example, they believed that the size and location of ridges on the head could indicate a person's artistic or spatial reasoning abilities. However, this assumption has been proven wrong and phrenology is now considered a pseudoscience. Despite its lack of scientific validity, phrenology has had a significant impact on current-day neuroscience, influencing the understanding of the specific functions of different parts of the brain that can be identified through scientific inquiry.
A 2,500-kg car hits a fence with a force of 400 N, and the collision takes one
second. What is the magnitude of its impulse?
A. 6.25 kg-m/s
B. 400 kg-m/s
C. 1,000,000 kg-m/s
D. 10,000 kg-m/s
Help plz
Answer:B. 400 kg-m/s
Explanation: To calculate impulse(I)
I = Force×time
where;
Force=400N
Time=1 seconds
I=400N×1 sec
I=400kg-m/s
Where,force =kgm/s^2
And time =seconds
Therefore the impulse unit =kgm/s
Answer:
B. 400 kg-m/s
Evolution is a A. prediction because it makes an educated guess about events that will occur in the future. B. law because it has been proven without exception under certain stated conditions. C. theory because it is an explanation that is supported by extensive observations, experimentation, and reasoning. D. variable because it is a factor that can be changed during experimentation.
Answer:
The answer is C
Explanation:
C. theory because it is an explanation that is supported by extensive observations, experimentation, and reasoning
Answer: the answer is C
Explanation:
Life-span ______ is the pattern of movement or change that begins at conception and continues through the human life span.
Answer:
Life span development
Explanation:
Life span development is usually defined as the entire process of changes or development that occurs within the body of humans right from birth till death. These changes that occur can be physiological, perceptive, social as well as emotional changes, and it commonly occurs in different phases of an individual's life.
The main stages of this development include infant stage, adolescent stage, death stage.
Some of the common factors that affect this development include heredity, nutrition, sex, and hormones.
Life-span development is the pattern of movement or change that begins at conception and continues through the human life span. The changes that take place from birth to death in the physical, cognitive, emotional, and social spheres are included.
Infancy, childhood, adolescence, maturity, and old age are just a few of the periods of life that this area of research looks at in terms of how people develop, learn, and adapt.
The elements that affect human growth throughout time—both biological and environmental—are taken into account during lifespan development.
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While Captain Montagne is flying the airplane full of passengers from New York to Houston, she engages the autopilot so that the plane will fly itself automatically for a while. Which part of your nervous system is similar to the autopilot of the airplane?
Answer:
"Autonomic nervous system" is similar to the autopilot of the airplane
Explanation:
The autonomic nervous system is a portion of the govern system which regulates the metabolic or the physiological processes of the human being. Inside the brain the autonomic nervous system is controlled by the hypothalamus. On the other hand the autopilot of the airplane is the combination of the system that are required for the automatic operation of the plane. Hence, both the things are similar but works for different process.
The practitioner is examining a client and notes that he has small, punctate skin hemorrhages on his abdomen and chest. This finding is suggestive of which of the following lab results?
-Low platelets
-Low red blood cells
-Low white blood cells
-Low neutrophils
Answer:
Answer is low platelets.
Explanation:
Platelets are one of the components of the blood. And it helps to prevent losing too much of blood during injury ,by forming a clot on the injury.
Ii should be noted that low platelets in the body can result to punctuate skin hemorrhages .Bleeding from the nose or vaginal can also be linked to low amount of platelets in the body.
A fungal spore germinates, giving rise to a mycelium that grows outward into the soil surrounding the site where the spore originally landed. which of the following accounts for the fungal movement, as described here?a. breezes distributing sporesb. cytoplasmic streaming in hyphaec. mycelial flagellad. karyogamy
Answer:
B) cytoplasmic streaming in hyphae
Explanation:
Fungal mycelium refers to the branched vegetative structure of the fungi which is formed by the growth of the hyphae. The hyphae contain three zones of growth: the apical, subapical and zone of vacuolation.
The hyphae grow in the apical region which forms a branched structure in which the cytoplasm continuously moves between the hyphae at the point of fusion towards the growing tip. This movement of the cytoplasm towards the growing tip is known as "cytoplasmic streaming".
This streaming of cytoplasm is responsible for the formation of a zone of vacuolation and the mycelium is formed.
Thus, Option-B is the correct answer.
The growing tip eventually gives rise to a branch. This is the beginning of the branched mycelium. Growing tips that come in contact with neighbouring hyphae often fuse with them to form a hyphal net. In such a vigorously growing system, the cytoplasm is in constant motion, streaming toward the growing tips. Eventually, the older hyphae become highly vacuolated and may be stripped of most of their cytoplasm.
The outward growth of mycelium from a fungal spore is due to b. cytoplasmic streaming in hyphae.
When a fungal spore germinates, it develops into mycelium, a network of hyphae that grow outward. As the fungus grows, the cytoplasm within the hyphae is transported towards the tips, allowing the fungus to expand and search for nutrients.
This apical growth is essential for the fungus to explore its substrate and forms a radial growth pattern. For example, in a fairy ring of mushrooms, a single spore starts at the center, and the mycelium grows outward, forming a circular pattern of fruiting bodies at the perimeter.
Other options like breezes distributing spores, mycelial flagella, and karyogamy do not account for the continuous outward growth of the mycelium. The correct answer is b.
Mark is participating in one of Posner's attention experiments. As he looks at the fixation point, an arrow pointing to the right appears. Then the stimulus appears in the left target area. The cue in this trial would be considered. A Valid B. InvalidC. Simple D.Symbolic of. E. Both simple and valid F. Both symbolic and invalid
Answer:
Mark is participating in one of Posner's attention experiments. As he looks at the fixation point, an arrow pointing to the right appears. Then the stimulus appears in the left target area. The cue in this trial would be considered "Both symbolic and invalid"
Explanation:
Posner' s attention test is a psychological test which is being conducted in order to check the attention and attention deficit of the person. The spatial orientation happens when the attention of the person is drawn towards a specific location, the attention is drawn because of the stimulus generation. Drawing attention is known as the cueing. The theory of attention is generally made on the basis of the target detection, visual orientation and also on alertness. sometimes it is believed that auditory stimulus is also included in it.
In circumstances where the body requires prolonged or increased levels of a hormone, the DNA of target cells will specify the synthesis of more receptors on the surface of the cells of the target organ. This is known as ________.
Answer:
Up-regulation.
Explanation:
Hormones may be defined as the chemical messengers of the body that can transmit information and maintains homeostasis. The hormones can directly go into the bloodstream and may release through the special ducts.
The receptors of the hormone is required for the binding of the receptors. To maintain the normal homeostasis of the body, the body shows the up regulation and down regulation. In up regulation the hormone levels increases in the body by increasing the receptor on the specific target organ.
Thus, the correct answer is up regulation.