The most massive extinction event in the history of Earth, in which 96 percent of all species became extinct over the course of a few thousand years, occurred during the

a. Cretaceous.

b. Devonian.

c. Orodovician.

d. Permian.

e. Silurian.

In a particular woodland community, two species of rodents coexist: mice and chipmunks. Both species compete for the same kinds of seeds and nuts. A species of owl that also lives in this woodland community preys on both rodent species.

What is the optimum temperature for clam development?

What did the first language sound like

Jenna says that an example of homeostasis is when body temperature is maintained at about 37° c. Allen says homeostasis is when breathing rate increases along with exercise. Who is correct

A giant molecule consisting of the sugar deoxyribose, phosphate, and nitrogen bases

Why does photosynthesis require water? a. because water provides oxygen atoms. b. because water provides electrons. c. because water accepts electrons. d. because water acts as a catalyst.

An education guess or rational explanation about a specific phenomenon

What are the technical name for red blood cells white blood cells and platelets?

What are the resources of the ocean

Which organism actively hunts other