7. What is pollen? * The reproductive cells of an animal
The reproductive cells of vertebrates
The reproductive cells of plants
None of the above.

4emphysema is a health condition in which the lungs can no longer expel carbon dioxide normally. as a result, a person who has emphysema may have high blood acidity levels. the body process that would attempt to return the blood ph to normal so that cells could function properly is called a. active transport b. acidosis c. homeostasis d. adaptation