Describe how embryonic development determines certain coat patterns in animals.

Explain how new body forms can originate by heterochrony

Draw diagrams that show how induction and morphogens can control early pattern formation and development of specialized structures in the appropriate places.

Voles that are born in the Spring have thin coats as adults, while voles that are born in the Fall have thick coats as adults. Most voles live only a few months; voles born in the Spring are alive during the warm summer season, while voles born in the Fall are alive during the cold winter season. The environment experienced by the mother during pregnancy determines coat thickness in the offspring. Now consider a situation in which the environment the vole mothers during pregnancy changes, such that voles born in the Fall now have thin coats. Assume in this case that the Winters are still cold. This scenario provides an example of which of the following hypotheses?   a.Environment mismatch hypothesis  b.Endocrine disruptor hypothesis c.Thrifty genotype hypothesis d.Plasticity first hypothesis