Which of the formed elements of the blood determines abo blood types? a. white blood cells b. red blood cells c. antibodies d. plasma i know that the answer is either red blood cells or antibodies and i know this: red blood cells have special molecules called antigens on their surfaces. each person has either the a antigen, the b antigen, both the a and b antigens, or none of the antigens on their red blood cells. a person’s immune system will respond to these antigens by reacting with protein antibodies, which circulate in their blood plasma. but, i'm still not sure which is the correct answer.

What’s this animal (picture is tagged) and where is it most likely to live, rainforest or desert?

Animal bodies (and even plant bodies for that matter) are complex enough that life couldn't exist without enzymes. enzymes are usually large, complex biological catalysts that are expensive to make. enzymes speed up the rate of chemical reactions without being used up during the reaction (they can be reused many times). they are highly specific in the reactions they regulate. knowing what enzymes are and how they function, why does this explain why complex life forms could not exist if there were no enzymes.

Ry was studying two populations of the same species of lizards. one population lived on an island and the other lived on the mainland. both populations were affected by a hurricane that hit the island and the mainland with equal force. a year later, henry was testing the gene frequency and saw a decrease in genetic variation in the island species, but not in the mainland species. which best describes a conclusion he might have reached? gene flow greatly affects small populations, but large populations can recover. genetic drift greatly affects small populations, but large populations can recover. gene flow greatly affects large populations, but small populations can recover. genetic drift greatly affects large populations, but small populations can recover.