1. one way that fossils form by the dead organism's soft tissue is by sediments such as sand.
a. repaired
b. replaced
c. preserved
d. bonded

2. a female bird develops a preference for males who can perform a particular dance. this is an example of something that could lead to
a. temporal isolation.
b. nutritional isolation.
c. geographic isolation.
d. behavioral isolation.

3. growing up, darwin saw that farm animals with preferred traits were chosen for breeding. those chosen animals usually produced offspring with the preferred traits. this best illustrates the process of
a. natural selection.
b. evolution.
c. artificial selection.
d. genetic engineering.