What is microevolution
3.
what is the most likely explanation for how speciation occurs?
a)it occurs only by gradual changes.
b)it occurs only by geographic isolation.
c)it occurs only by natural selection.
d)it occurs by more than one method.

Put the following steps of the convection process in the correct order. 1. gravity pulls cooler matter downward. 2. the matter expands and decreases in density. 3. an up-and-down flow of matter produces a convection current. 4. matter is heated. 5. warmed matter is forced upward. question 2 options: a) 4, 2, 5, 1, 3 b) 2, 4, 3, 1, 5 c) 3, 2, 5, 4, 1 d) 1, 4, 2, 5, 3

How does science influence the decisions made about social, economic, and political issues?

Organisms may contain up to five levels of organization within their bodies. which level of organization is shown by the liver? a. tissue b. organ c. organism d. organ system