Which statement describes a characteristic common to both active and passive transport

A. Both move solute molecules against a concentration gradient

B. Both need hormones or activator molecule to move molecules

C. Both require energy to move large molecule

D. Both use protein channels as passageways

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?

Adistinctive characteristic of mammals that is not observed in other vertebrates is

Look at the illustration of four letters from the american manual alphabet. decide whether the description of the letter is a good definition. if not, choose a counterexample. the letter i is formed by sticking up the smallest finger and folding all the other fingers into the palm of your hand with the thumb folded over them while keeping your hand still.