4. Birds, reptiles, and monotremes have macrolecithal eggs while placental mammals have microlecithal eggs. These egg ty

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4. Birds, reptiles, and monotremes have macrolecithal eggs while
placental mammals have microlecithal eggs. These egg types have
evolved as a result of differential allocation of maternal
resources. Explain how each group provides energy to the growing
embryo/fetus with emphasis on how the energy allocation is
different. (This is not a difficult question – just take some
time to “translate” the vocabulary and concepts before
answering.)
5. When professors generalize what body structures are formed
from the ectoderm, mesoderm, and endoderm; it is usually stated
that the alimentary canal is derived from endoderm and the
integument is derived from the ectoderm. However, this is
oversimplified and thus incorrect. Which germ layers actually make
up these two systems? Be specific about the origins of the
STRUCTURES in each system. Additionally, only address the
alimentary canal, not the full digestive system.