What happens as a river gets older?

A. Its stream gradient increases.

B. Its floodplain widens.

C. Its water flows faster.

D. Its suspended load contains bigger rocks.

How many phases of mitosis is there?

Why do you think certain mutations persist if they can be lethal?

If water were a nonpolar molecule, how would its properties be different? a. water would be able to climb up inside plants. b. water would be a much heavier molecule. c. water would form hydrogen bonds. d. water would not stick together as well.

What is unique about the members of the group of fungi to which Penicillium notatum belongs? They are not important for medicine. They are not made up of hyphae. They are used in fermentation. They lost the reproductive phase.

If plants need life to grow, then plants in the shade will grow slowly what is the student doing?

How do we determine if an animal is truly extinct

Warm fronts usually bring cloudy sky. A. true B. False

What is the reference between relative dating and absolute dating

An amoeba is a unicellular organism, which doesn't have a stomach for digestion of food. How does food storage and digestion take place in an amoeba?

Select all of the answers that apply. What major factors affected earth's changing climates?