Explain the following terms: ectoderm, endoderm, mesoderm and stem.

Which choice below shows a correct order of events during development? Gastrula, blastula, neural tube closure, and primary vesicle formation. Blastula, neuroepithelial cell proliferation, axonogenesis and synapse maturation. Gastrula, dendritogenesis, neural tube closure and synapse formation. Neural tube closure, notochord formation, dendritogenesis and synapse formation. Axonogenesis, neuronal migration, synapse maturation, synaptic specialization

Describe external fertilization  process of sea urchin egg with diagram

Tabulate all the differences between frog and mammalian ovaries, frog and mammalian oogenesis

Give Detailed Solution (no need Handwritten)

Which of the following rows correctly identifies a difference between blastocysts and morula? Select one: A.  Blastocyst Morula Contains trophoblast and a zygote Contains 8 cells that are totipotent B. Blastocyst Morula Contains inner cell mass with germ layers Contains 8 cells that are totipotent C. Blastocyst Morula Contains trophoblast with germ layers Contains 16 cells that can become any cells in the human body D. Blastocyst Morula Contains trophoblast and inner cell mass Contains 16 cells that can become any cells in the human body

State the differences of the frog and human embryology.

Describe an example of each of the following: a pre-zygotic barrier to reproduction a post-zygotic barrier to reproduction