Active transport refers to a substance moving from areas in which it has low concentration to an area with high concentration, one example i guess is endocytosis, "<span>the taking in of matter by a living cell by invagination of its membrane to form a vacuole"</span>
Answer:
gases of nitrogen and many more
<span>The bond that holds together the two amino acids is a peptide bond, or a covalentchemical bond between two compounds (in this case, two amino acids). It occurs when the carboxylic group of one molecule reacts with the amino group of the other molecule, linking the two molecules and releasing a water molecule.</span>
Active site
an active region an enyme that binds to a protein or other substance a reaction
they dont have to worry about not having enough pollen