Before meiosis begins, chromosomes duplicate, making chromosomes that have sister chromatids. Which step is this?

A. prophase

B. telophase

C. interphase

D. metaphase

Why hasn't mount Tambora erupted yet.

What is an enzyme? What does "catalyze" mean? What is the "active site"?

What is bones made of

How do bacterial cells differ from the cells of eukaryotes

A cell is placed in a solution containing a higher solute concentration than the interior of the cell. What effect would this have on the cell? a. The cell would divide. b. The cell would rupture. c. The cell would shrivel. d. The cell would swell.

Which of the following factors does NOT limit population growth? a. species c. space b. carrying capacity d. food

What happens if a mutation is in a gamete

Which area of the stomach directly adjoins the small intestine?

Athletes foot is caused by

Compare the characteristics of rivers and streams.