(b) Identify a dependent variable in the experimental design. Identify a negative control for the effects of hormone addiction. Identify a likely reason why the researchers continued their experiment for the 240 minutes.

I’m doing some practice exam questions for biology, and i’m not sure how to do these 3 parts to the question.

What are the two main phases of a cell cycle

Waianapanapa beach in hawaii is a black-sand beach that was formed by waves crashing against volcanic rock. the sand can be very hot on sunny days. which statement best explains why? o a. the black sand has no heat capacity. b. the black sand absorbs no radiation. o c. the black sand is immune to insolation. d. the black sand has a low albedo.