I believe the correct answer from the choices listed above is option B. The mesoderm is the layer of tissue that forms during gastrulation and becomes the animal's organs. It <span>is one of the three primary germ layers in the very early embryo. Hope this answers the question.</span>
Answer:
Darwin’s findings based:
a. Organisms descended from a common ancestor
Explanation:
Darwin thought of evolution as "descent with modification," a process in which species change and give rise to new species over many generations. He proposed that the evolutionary history of life forms a branching tree with many levels, in which all species can be traced back to an ancient common ancestor.
Answer:
All the possible alleles for a gene with multiple alleles cannot be expressed by single individual
Explanation:
Gene pool refers to the sum total of all the alleles of all the genes which are present in a population. Human beings are diploid organisms. One individual can have only two possible alleles for a gene. A gene can have two or more than two alleles. Since all the possible alleles for a gene with multiple alleles cannot be expressed by single individual, a gene pool cannot be made of one individual.
"Estrogen is involved in a feedback mechanism associated with the follicular phase of menstruation.<span> In a negative feedback mechanism, estrogen released from follicles influences the pituitary gland to decrease the production of follicle stimulating hormone, also known as FSH. In a positive feedback mechanism, rising estrogen causes FSH to increase"
Find out the full answer here~
http://www.ask.com/science/estrogen-play-role-feedback-mechanism-9cc4f9c5050fed0a
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