Answer:
The correct answer is genetic drift.
Explanation:
The phenomenon of changing the frequency of an allele in a specific population with time is known as genetic drift. The mentioned gene variation or the modification in the frequency of the allele is required to take place abruptly so that the phenomenon of genetic drift can take place. The environmental factors do not play an essential role in the phenomenon of genetic drift to take place.
The process of genetic drift occurs generally due to random sampling of organisms, it illustrates the random change in the number of gene variants within a population. When the existence of the different forms of a gene, that is, alleles, enhances or reduces by chance with time within a population, the phenomenon of genetic drift occurs. Thus, the mentioned case is an illustration of genetic drift.
antagonism
When two hormones cancel each other out or have opposite effects it is called antagonism.
<h3>What is an example of antagonism?</h3>
- Traditional examples of antagonistic hormones include insulin and glucagon.
- In contrast to glucagon, which stimulates glycogenolysis, or the conversion of glycogen to glucose, insulin stimulates glycogenesis, or the conversion of glucose to glycogen.
<h3>What does the term "antagonistic hormones" mean?</h3>
- Antagonistic hormones are those that work to bring body circumstances back from extremes to within acceptable bounds.
- An illustration of how the endocrine system maintains homeostasis through the action of antagonistic hormones is the regulation of blood glucose concentration (by negative feedback).
<h3>How do antagonists to hormones function?</h3>
- Infertility, endometriosis, and uterine fibroids are just a few of the diseases that gonadotropin releasing hormone (GnRH) antagonists are used to treat in women.
- GnRH is a hormone released by the hypothalamus that is the target of GnRH antagonists, which stop it from functioning.
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The vertebrate endoskeleton is internal while an arthropod's exoskeleton is not
Answer:
d) A constitutively active mutant form of PKA in skeletal muscle cells would lead to an excess in the amount of glycogen available.
Explanation:
This occurs in the process of Glycogenolysis. The process involves breaking down of glycogen to glucose -1- phosphate and glycogen which helps in the release of glucose into the blood stream to prevent hypoglycemia(low blood sugar). The glucose-1-phosphate is later converted to glucose -6-phosphate. The latter enters the glycolytic pathway in which the reaction is catalysed by the enzyme phosphoglucomutase.
This homeostatic glucose regulation is regulated by the protein kinase(PKA)/ cAMP pathway in the skeletal muscles, the liver and the pancreas.
<h2>Evolutionary analysis of organisms</h2>
Explanation:
- Some organisms, which were characterized together determined to genetically very different .
- Using the analysis of RNA developed by Carl Woese, scientists are now able to classify the human evolution
- living things based on genetic information instead of expressed characteristics.
- Genetic information is more specific and can give clues as to the evolutionary ancestry of organisms.
- That is the reason adding of various domains in previous system of classification is allowed for a comparison of species genetic code
