Biology Questions

1.What organ is characteristic of mollusks? 2. What is the chief advantage that the eye of a dragonfly has over the eye of a hawk? 3. Although amphibians were the first animals to move onto dry land, they were still dependent on water for reproduction and lor respiration. What evolutionary adaptations allowed reptiles to become the first "true" land vertebrates? 4. Distinguish between the three types of mammals on the basis of their modes of reproduction. Give examples of each.

Describe the differences and similarities in the development of invertebrates and vertebrates.

Describe the differences and similarities in the development of invertebrates and vertebrates.

Motor Neuron Pathway

"Neuron 1" directly innervates a spinal cord motor neuron that projects onto a muscle in the left back flipper (of a sealion). Assuming that segmentation of the spinal cord follows a similar pattern in all mammals, approx in which of the 4 major regions of the spinal cord and within which spinal cord structure would you expect to find the axon terminals of neuron 1? Would you expect the cell body of neuron 1 to be in the right or left hemisphere? Explain your reasoning.