The function of the keratin is to both a and b, and prevent the loss of water.
What is keratin?Keratin is a protein that is going to be a main molecule in the outer layers of the epidermis, in hair and nails. It is a molecule characterized by its hardness, which helps the skin to be firm and elastic. Its function is to give impermeability to the skin and protection so that pathogens and water from it are repelled.
Therefore, we can confirm that the function of the keratin is to both a and b, and prevent the loss of water.
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Anyone in grade 10-11?? Who has ig or S?
A hot air balloon lifts 50 meters vertically into the air and then comes back down. What are the displacement and distance of the balloon’s flight?
The displacement is zero and the distance is 100 meters
Compare and contrast the ways that metabolic waste products enter the excretory systems of flatworms, earthworms, and insects.
The flatworm is made up of a model system, such as protonephridia, which aids in ISF filtering (interstitial fluid). Earthworm metabolic waste enters the interstitial fluid and consists of metanephridium involved in excretion.
What are the excretory systems of flatworms, earthworms, and insects?
The flatworm is made up of a model system, such as protonephridia, which aids in ISF filtering (interstitial fluid). Earthworm metabolic waste enters the interstitial fluid and consists of metanephridium involved in excretion.
The metabolic waste products enter the insect system via the hemolymph (extracellular fluid of insects).
Ciliated cells in flatworms draw interstitial waste products into protonephridia. Waste products from interstitial fluids enter the coelom of earthworms. Cilia then transport wastes into metanephridia via a funnel that surrounds an internal opening to the metanephridia.
The Malpighian tubules in insects pump fluids from the hemolymph, which receives waste products during an exchange with cells during circulation.
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The process of _____ induces the proliferation of antigen specific t cells and b cells.
The process of clonal selection induces the proliferation of antigen specific T cells and B cells.
What causes T cells to multiply?A full-fledged spontaneous proliferation in which T lymphocytes with greater affinities to MHC-self-antigens (and commensal antigens) are activated for proliferation is brought on by the absence of any memory population.
Antigens attach to antibodies in humoral immunity, activating B cells to create plasma cells and memory B cells. Then, antigens identify them for eradication. In cell-mediated immunity, the antigen is engulfed by macrophages, which then expose it on their surface. Helper T cells attach to and activate macrophages.
Cell-mediated immune responses include the destruction of infected cells by cytotoxic T cells or the destruction of intracellular pathogens by macrophages.
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quantification of gait parameters in freely walking wild type and sensory deprived drosophila melanogaster
Quantification of gait parameters in freely walking wild type and sensory deprived drosophila melanogaster. True.
The analysis of locomotion in massive animals, drastically mammals, often is based on the position of visual marks generally joints that may be without problems detected and tracked.
However, in smaller insects including Drosophila, any such method becomes no longer most effective technically tough however is likewise probable to disturb on foot. Such challenges have a more distinct examination of the that incorporate walks conduct to overcome those boundaries and the biomechanical features on foot in Drosophila we became to an optical effect referred to as general internal mirrored image.
However, if a denser material, which includes the tarsus of an insect leg, contacts the surface of the glass, then the domestically overall internal mirrored image will scatter the light.
Disclaimer:- your question is incomplete, please see below for the complete question.
Quantification of gait parameters in freely walking wild type and sensory deprived drosophila melanogaster. T/F
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This bombardier beetle is spraying a boiling hot liquid that contains irritating chemicals, used as a defense mechanism against its enemies. The beetle stores two sets of chemicals separately in its glands. Using what you learned about chemistry in this chapter, propose a possible explanation for why the beetle is not harmed by the chemicals it stores and what causes the explosive discharge.
The two chemicals are mixed and a chemical reaction occurs that produces the boiling hot liquid that contains irritating chemicals.
What is chemical reaction?We know that some organisms have a defense mechanism. This implies that they are able to protect themselves from attacks by the use of certain structures or chemicals in their bodies. This helps to ward off predators that may want to prey on the organism.
In this case we have the bombardier beetle. The organisms have two separate organs that store chemicals. These chemicals do not hurt the bombardier beetle but can be used when attacked. The chemicals are stored in different glands.
What happens is that when the bombardier beetle, the two chemicals are mixed and a chemical reaction occurs that produces the boiling hot liquid that contains irritating chemicals which is used as a defense mechanism against its enemies.
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Repetitive dna sequences usually evolve very quickly. based on this fact, molecules that have a rapid mutation rate are best used when studying relationships among?
Repetitive DNA sequences usually evolve very quickly. Based on this fact, molecules that have a rapid mutation rate are best used when studying relationships among: very closely related species.
Repetitive DNA sequences are the part of DNA segment that are repeated multiple time. These sequences are also known by the name tandem repeats. The repeats are usually a part of the non-coding part of the DNA strand.
Mutation is the alteration in the sequences of DNA. This may or may not result in the change of some trait or characteristic. The mutation is caused due to deletion, addition, inversion or repetition of some sequences in the gene. Some mutations do not show any effect and hence are called silent mutations.
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scientists calculated the net primary productivity at two different forest sites. both forests have the same gross primary productivity. forest a has a net primary productivity of 1,650kcal/m2/year, and forest b has a net primary productivity of 1,110kcal/m2/year.
A producers have lower rates of cellular respiration than forest B producers.
What is NPP and GPP in ecosystem?Gross primary productivity is the rate of photosynthesis. Net primary productivity is the rate of storage of organic matter except which is utilized for the respirations by plants. Hence , we can say that NPP = GPP- plant respiration .
Forest A producers have lower rates of cellular respiration than forest B producers. (Since gross primary productivity is the same, forest B has a lower net primary productivity; therefore, it has a higher rate of cellular respiration.)
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Which example is a scientific question that could be used to start a scientific..
investigation?
A. What is the best method for open-ocean fishing?
B. Are trawling nets easier to use than other fishing nets?
C. Is the use of trawling nets an ethical fishing method?
OD. Which type of fish is most commonly caught in trawling nets?
SUBMIT
k
Answer:
D. Which type of fish is most commonly caught in trawling nets?
Explanation:
A. fishing question not science
B. nets question not science
C. ethics question not science
An observation about how to solve a problem is called a
Answer:
An observation about how to solve a problem is called a theory / scientific method
Explanation:
If someone is severely burned, how might the functions of skin differ than someone who has not been burned?
Annual plants (grasses) growing in a recently burned patch of forest represent the first stage in
you are estimating the time since the divergence of two species and used hemoglobin for your molecular clock. you would like to get independent support for your estimate. if you also use cytochrome c, which result do you expect?
The result that one should be expected from this experiment is the number of amino acid differences between the two species will be fewer for cytochrome C than for hemoglobin.
What is a factor that is used as a molecular clock?A molecular clock utilizes DNA sequences in order to calculate how long it has been since related species are typically separated or diverged from their common ancestors.
According to the question, the accumulation of amino acids in two species will be less in number as compared to the existence of hemoglobin genes. This is because this type of estimation independently supports the evidence.
Therefore, the number of amino acid differences between the two species will be fewer for cytochrome C than for hemoglobin is the result that one should be expected from this experiment.
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Your question seems incomplete. The most probable complete question is as follows:
The number of amino acid differences between the two species will be the same for both genes.The number of amino acid differences between the two species will be fewer for hemoglobin than for cytochrome c.The number of amino acid differences between the two species will be fewer for cytochrome c than for hemoglobin.How do structural differences between starch and cellulose lead to functional differences in plants?
Starch may be either straight or branched in its structure, and since it can form compact structures and is simple to break down, plants employ it as a storage medium for energy. The molecules that make up cellulose are bonded to one another in opposing directions. Cell walls are composed of cellulose, which provides plant cells with protection as well as structure.
This is further explained below.
What are plants?Generally, Plants are the most common kind of photosynthetic eukaryotic organisms that belong to the kingdom Plantae.
Historically, the kingdom of plants encompassed all living things that were not animals, including algae and fungi; however, all current definitions of Plantae exclude the fungi and some algae, as well as the prokaryotes.
This is because the plant kingdom evolved to include only animal-free life forms.
In conclusion, Plants use starch as a storage medium for energy because it can form compact structures and is easy to break down. Starch may be either straight or branched in its structure. Cellulose is characterized by its molecular components' antiparallel orientations and the direction of its intermolecular bonds. Cellulose provides structure and defense for plant cells in the form of cell walls.
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A stretch of river running through a state wildlife preserve is 25,000 m long. A team of conservationists make a scale model of the river that is 1 m long. What is the scale of the model?
Since the state wildlife preserve is 25,000 m long and a team of conservationists made a scale model of the river that is 1 m long, the scale of this model is: B. 1:25,000.
What is scale factor?A scale factor can be defined as the ratio of two (2) corresponding length of sides or diameter in two similar geometric figures such as equilateral triangles, river, planets in our solar system, etc.
Let S represent the length of the state wildlife.Let R represent the length of the river.
For this model, the scale factor would be given by:
Scale factor = R:S
Scale factor = 1:25,000.
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Complete Question:
A stretch of river running through a state wildlife preserve is 25,000 m long. A team of conservationists make a scale model of the river that is 1 m long. What is the scale of the model?
A. 1:1
B. 1:25,000
C. 10:25
D. 2,500:1
Begin by making a list of questions that will help you conduct research on the topic. To get you started, here are some questions that may lead you to a better understanding of the topic:
What is cancer? Is cancer only one disease?
How does cancer affect the cell cycle and the growth of cells? How is this process similar to or different from how an infectious disease affects cells?
How do genes play a role in cancer progression?
Are there any environmental or pathogenic factors that can cause cancer?
How does cancer progress in the body? Why is cancer difficult to treat in the later stages?
What do the terms stage and grade mean in the context of cancer?
What current treatments exist for cancer?
What treatments are on the horizon?
What are the challenges of treating or curing cancer?
Now write down four more questions about cancer that will help you strengthen your arguments in your research paper.
A set of illnesses known as cancer involve abnormal cell proliferation and have the ability to invade or spread to different bodily regions.
What is cancer? Is cancer only one disease?
A set of disorders known as cancer involve aberrant cell proliferation and have the ability to invade or spread to different bodily regions.
The cells in a particular area of the body proliferate and replicate uncontrollably. The malignant cells have the ability to enter nearby healthy tissue and kill it, including organs. Sometimes, cancer starts in one place of the body before moving to another. The term "metastasis" refers to this action.
Cancer may potentially travel to distant areas of the body through the bloodstream. These components could be the brain, liver, lungs, or bones. The malignancy is given its original location's name even if it spreads.
An umbrella term for more than 100 distinct diseases is cancer. Almost anywhere in the body can see its development.
Four main types of cancer are:
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What type of approach did helmholtz take in investigating how the nervous system works?
Helmholtz took the Empiricist approach in investigating how the nervous system works.
In the late 1800s, a German scientist named Hermann von Helmholtz took the empiricist approach in investigating how the nervous system works. He did this by creating detailed models and theories based on observations and experiments.
Helmholtz's work was extremely influential in the development of modern neuroscience. His theories helped to explain how information is transmitted between neurons, how sensory information is processed, and how motor commands are generated.
Despite the advances that have been made since Helmholtz's time, his approach remains an important part of neuroscience today. By constantly observing and experimenting, we can continue to learn more about how the nervous system works and how to optimize its function.
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During prebiotic evolution, macromolecules eventually began to replicate based on?
During prebiotic evolution, macromolecules eventually began to replicate based on smaller complimentary units.
The transition from non-living to living materials is a gradual one in the origin of life. Simple inorganic compounds could have formed simple organic compounds (monomers) such as amino acids and nucleotides, through an energy-driven reaction. These monomers were combined to create larger, more complicated compounds, such as polymers of proteins and nucleic acids. The polymers might have come together into self-sustaining or self-replicating units or structures.
These self-sustaining or self-replicating units or structures (macromolecules) may group together to form colonies that perform metabolism, or they may be encased in membranes to form cell-like structures.
Hence, we can say that smaller complimentary units are the basis of macromolecule replication.
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fecal microbiota transplantation is superior to fidaxomicin for treatment of recurrent clostridium difficile infection
The recommended course of treatment for recurrent Clostridium difficile infection (rCDI) is fecal microbiota transplantation (FMT).
A significant contributor to nosocomial diarrhea, Clostridium difficile infection (CDI) accounts for 20%-30% of diarrhea brought on by antibiotics. The prevalence of CDI is rising both in hospital settings and the general population, and the condition represents a significant threat to public health. Advanced age, comorbidity, and recent antibiotic usage are risk factors for developing CDI. Ninety-day mortality is up to 22%, and CDI is a contributory factor in up to 40% of these fatalities. The chance of a recurrence is 20% and rises with age over 65, a serious underlying condition, and the use of antibiotics or proton pump inhibitors.Learn more about the Microbiota with the help of the given link:
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How many different kinds of gametes (with respect to a particular gene locus) are formed by an individual who is homozygous at that locus?
There is only one kind of gamete formed by an individual who is homozygous at that particular locus.
What is the law of segregation?Gregor Mendel investigated the trait inheritance in pea plants. He put up a theory in which attributes were determined by pairs of "heritable elements," or genes. Alleles, which are various variants of a gene, exist.
The appearance of the organism is determined by a dominant allele, which conceals a recessive gene. Each gamete produced by an organism has a single gene copy that is chosen at random.
The genotypes (allele combinations) and phenotypes (observable qualities) of progeny from genetic crossings may be predicted using a Punnett square. An organism with a dominant trait can be tested to see if it is homozygous or heterozygous using a test cross.
Therefore, only one kind of gamete will be formed by an organism that is homozygous at that particular locus.
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Which of the following areas of study focuses on the exchange of energy, organisms, and materials between ecosystems? a. organismal ecology b. landscape ecology c. ecosystem ecology d. community ecology
The correct option is (b) landscape ecology.
A complex network of living things that interact to exchange food and energy is referred to as an ecosystem in ecology.
What are different ecology?The study of individual adaptations (morphological and behavioral) that allow them to live in a certain habitat is known as organismal ecology.The subject area known as "landscape ecology" is concerned with the relationship between ecosystem processes and landscape patterns. Thus, the landscape ecosystem frequently encompasses several ecosystems and investigates the interchange of materials, organisms, and energy.The biological field of ecosystem ecology studies how biotic and abiotic elements of an ecosystem interact. Ecosystem ecology thus concentrates solely on a particular ecosystem.The topic of community ecology examines how communities develop among populations of interdependent species. Community ecology thus concentrates on assemblages of related species within a community.Learn more about the Landscape ecology with the help of the given link:
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in corn, three dominant alleles are necessary for aleurone color. the genotype b– d– r– is colorful. recessive homozygosity for any one gene results in a colorless phenotype. predict the phenotypic ratios in the progeny of the following crosses. (not all numbers will be used.)
According to the stems, the percentages required for the color of the aleurone, the genotype b– d– r– is colored are B is 75%, D is 75% and R is 50%
What is genetic probability?The probability calculation in Genetics follows the same rules as the probability calculation in different games. It is determined by values ranging from 0 to 1, where 0 is the probability that this event will not occur at all and 1 is the certainty that this event will occur.
With this information, we can conclude that A probability rule that is very useful in genetics is the product rule, which states that the probability of two (or more) independent events occurring together can be calculated by multiplying the individual probabilities of the events.
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In corn three dominant genes are necessary for aleurone color. The genotype B__D__R is colored. Any homozygous recessive for one gene is colorless. Predict the expected phenotypic ratio COLORED: COLORLESS offspring from the cross of BbDdrr x BbDdRr.
for ingested foods, the first opportunity for enzymatic digestion occurs in the . view available hint(s)for part a for ingested foods, the first opportunity for enzymatic digestion occurs in the . pancreas stomach large intestine small intestine mouth
According to the research, the correct option is mouth. For ingested foods, the first opportunity for enzymatic digestion occurs in the mouth.
What is enzymatic digestion?They are proteins whose function is that they allow the digestion of food and the assimilation of nutrients and the decomposition of the different nutrients are secreted by the pancreas and go to the duodenum to exert their action, such as amylase, lipase.
In this sense, enzymes, since they are proteins that break down nutrients, are formed inside the cells present in the mouth and have a prominent role in all phases of digestion, which starts from the mouth with the saliva that contains enzymes for digestion, preventing the formation of toxins and other substances harmful to the digestive tract.
Therefore, we can conclude that according to the research, the correct option is mouth. For ingested foods, the first opportunity for enzymatic digestion occurs in the mouth.
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2013 martins a prospective study comparing single and double fascicular transfer to restore elbow flexion after brachial plexus injury.pdf
Study comparing single and double fascicular transfer to Elbow flexion strength was evaluated with a push-and-pull dynamometer 12 months after surgery.
When the upper brachial plexus is injured, the biceps muscle can be reinnervated to restore elbow flexion (single reinnervation), but simultaneous brachialis and biceps function restoration (double reinnervation) has been advised to increase elbow flexion strength. The goal is to assess the morbidity and results of single versus double muscle reinnervation in regaining elbow flexion after incomplete brachial plexus injury. Methods: Single or double muscle reinnervation was prospectively performed on 40 consecutive patients. Twelve months following surgery, the elbow flexion strength was assessed using a push-and-pull dynamometer. Both groups' elbow flexion strength test results were comparable.To learn more about injured.
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As noted in Figure 53.2, an important assumption of the mark-recapture method is that marked individuals have the same probability of being captured as unmarked individuals. Describe a situation where this assumption might not be valid, and explain how the estimate of population size would be affected.
If an animal is lured in with food, it is more likely to be recaptured if it craves the same food. Because the population size (N) = mn/x N, the number of marked animals recaptured (x) would be an overestimation.
Briefing :
Alternatively, if an animal has a bad experience during capture and learns from it, it may be less likely to be captured again. In this example, X is an underestimation and N is an overestimation.
Population size :Population size is defined in population genetics and population ecology as the number of individual organisms in a population. Population size is intimately related to genetic drift and is the fundamental cause of phenomena such as population bottlenecks and the founder effect. The four primary factors are the birth rate, the death rate, immigration, and emigration.
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Which is the best ending for : A channel .......
A. Allows ions, sugars and amino acids to diffuse themselves across the membrane
B. None of these
C. Prevents unwanted molecules from entering the cell.
D. Transport ions, sugars and amino acids across the membrane.
Blood vessels that supply nutrients and oxygen only to the heart amuscles make up the specific type of circulation called the?
Blood vessels that supply nutrients and oxygen only to the heart muscles and make up for a specific type of circulation are called pulmonary veins.
What are pulmonary veins?Blood tubes called pulmonary veins take oxygen-rich blood from your lungs and deliver it to your heart. The pulmonary circuit of your body includes your pulmonary veins. Blood travels via this network of blood veins from your heart to your lungs. Your pulmonary arteries are also a part of this circuit.
There are two primary distinctions between your pulmonary arteries and veins:
They transport many blood kinds. Your pulmonary arteries convey blood that is low in oxygen. Blood rich in oxygen is carried through your pulmonary veins.They move in various directions. Blood travels via your pulmonary arteries from your heart to your lungs. Blood is transported to your heart from your lungs through your pulmonary veins.Therefore, blood vessels that supply nutrients and oxygen only to the heart muscles and make up for a specific type of circulation are called pulmonary veins.
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For the wild-type hamsters that received t SCN transplants, what would have been an appropriate experimental control?
The appropriate control, in this case, would be to transplant the SCN from one wild-type hamster to another wild-type hamster.
What is SCN?As the primary circadian pacemaker in the mammalian brain, the suprachiasmatic nucleus (SCN) of the hypothalamus produces circadian rhythms in rest and exercise, body temperature, neuroendocrine operation, autonomic, memory, and psychomotor performance, as well as a variety of other psychological and physiological processes.
The circadian timing system, a crucial brain mechanism, is controlled by the SCN (CTS).
Therefore, in the case of SCN transplants in wild-type hamsters, the appropriate control is the transplant of SCN from one wild-type hamster to another wild-type hamster.
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What are the roles of oxytocin and prolactin in regulating the mammary glands?
The correct answer is Oxytocin controls milk release, while prolactin controls milk production.
Two hormones, oxytocin and prolactin, play a major role in the creation and release of milk from the breasts during the breastfeeding stage. Prolactin, whose namesake refers to milk and means "for," boosts milk production.
Contrarily, oxytocin causes the smooth muscle cells surrounding the breast glands to contract, causing the milk to be released.
During labor, oxytocin also aids in the contraction of the uterine muscle. The pituitary gland and the hypothalamus, two interrelated brain regions, are responsible for producing both of these hormones.
Thus, the hypothalamus is essentially a region of the brain made up of several nuclei, or collections of neurons.
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After a consumer selects and attends to a stimulus, the perceptual process shifts its focus to ______.
After a consumer selects and attends to a stimulus, the perceptual process shifts its focus to organizing, categorizing, and interpreting the incoming information.
What is the definition of customer behaviour?The purchase, consumption, and disposal of items, services, time, and ideas by decision-making units is referred to as consumer behaviour.
Consumer behaviour is the study of how individuals make purchasing decisions. It seeks to comprehend how customers select, utilise, and discard items and services, as well as the numerous stages people go through prior to making a purchase.
In general, there are five major aspects that influence consumer behaviour, i.e. whether a target client purchases a product or not. Psychological, social, cultural, personal, and economic considerations are among them.
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27. In a study researchers looked at the effects of nutrition on reading ability. In Group A, children
ate at least three ounces of dark green vegetables every day for one month. In Group B, children
were fed their regular diet. At the end of the month, the children took a reading comprehension
test. Those who ate the green vegetables every day for one month (Group A) did not vary in their
test scores when compared to Group B.
What is the Experimental Group:
What is the Control Group:
What is the Dependent variable?
What is the Independent variable?
In a study researchers looked at the effects of nutrition on reading ability. In Group A, children ate at least three ounces of dark green vegetables every day for one month. In Group B, children were fed their regular diet. At the end of the month, the children took a reading comprehension test. Those who ate the green vegetables every day for one month (Group A) did not vary in their test scores when compared to Group B.
Experimental group- Students group A & B
Control Group- Diet
Independent variable- Diet
Dependent variable- Reading comprehension
Experimental group is the people on whom the experiment is done in the following case will the children in Group A and Group B.
Control Group in this case will be the diet the children were provided i.e. for Group A having ,diet of dark vegetables and Group B having regular diet.
Independent variable is the variable that we manipulate and control in experiment. in this case will be the diet of the children that has been manipulated for both the groups that is manipulated for measurement.
Dependent variable is the variable that is dependent on independent variable and changes with its manipulation. It will be the ability of reading the comprehension by the students of both the groups.
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