1.Fish gills are organs that allow fish to breathe underwater. Most fish exchange gases like oxygen and carbon dioxide using gills either on side of the pharynx.
2.Gills are branching organs located on the side of fish heads that have many, many small blood vessels called capillaries.
3.The colour is red
4. A Gill filaments project from each arc between the dorsal upper and ventral lower surfaces of the filaments.
since he memorized 15, he has only 10 left. so it should be 10/25
An amino acid is an organic molecule that is made up of a basic amino group (−NH2), an acidic carboxyl group (−COOH), and an organic R group (or side chain) that is unique to each amino acid.
The answer is A, 'a mammal' because it goes with the copulative verb 'to be', i. e., 'is'.
Answer:
Prokaryotae, Protoctista, Plantae
Explanation:
