B. Why do animals need to migrate farther if they live on flat terrain (which is more common in the eastern U. S.) rather than in a mountainous region (which is more common in the western U. S.)? (2
points)

The cluster of developing cells from conception until birth is called an

What evidence did mendel find that supported his law of independent assortment? a. some traits are controlled by several different genes. b. a trait can be passed on from a parent to an offspring. c. most traits have a dominant form and a recessive form. d. different traits are passed on independently of each other.

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm