What is a limiting factor of a desert frog that requires rocks for shelter & insects for food? a. drought
b. scarcity of rocks
c. abundance of insects
d. shelter
e. rain

Ascientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas which group of statements best describes all of the materials he is using in the investigation?

Which substance contains thylakoids? a) nadph b)atp c)stroma d)chloroplast

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?