Biology Questions! Really challenging.?

Question

1. Name two animal phyla whose members show segmentation.
2. What is one advantage of the multichambered heart that is found in some vertebrates?
3. Name one advantage and one disadvantage of being a hermaphrodite.
4. List three characteristics that insects share with other members of the subphylum myriapoda.
5. List two differences between insects and other members of the subphylum myriapoda.
6. The ventral muscles of the belly are more developed in amphibians than they are in fishes. Explain why?
7. Female mosquitoes feed on blood, while male mosquitoes feed on plant sap or nectar. How is this difference in feeding behavior important for the reproductive success of mosquitoes?
8. Shrews are the smallest mammals, some weighing as little as 2 g(0.07oz). They also eat constantly and must hunt for food both day and night. Explain why shrews have such a voracious appetite.
9. What primates exhibit bipedalism?

Answer 1

6. Since many amphibians occaisionally leave the water, they must contend with gravity. The muscles hold the belly above the ground.