What period did the dinosaurs go extinct?

a. Quaternary

c. Jurassic

b. Cretaceous

d. Permian

which statement best explains why some cells in the reproductive system only respond to certain hormones

What is intrasexual selection and intersexual selection?

Hypothesize about what would happen to the climate of there were no ocean

Which of the following is a possible Noble gas notation? A [Xe] 6s26p6 B [Kr] 5s25d85p6 C [Xe] 6s25d106p4 D [Kr] 5s24d105p6

What is An easy way to describe low and high air pressure

Explain how traits can be affected by inheritance and the environment?

Do any of the proteins in your plasma come from food proteins

After 5 divisions, how many cells are there?

A student monitored tides using a webcam. She noticed that the tide reached different parts of the shore at different times of day. Which factors can explain the student's observations?

In gamete formation, the starting cells in females are the ___ and the