Changes in a dna sequence that affect genetic information are known asa)expressions. b)hybridizations. c)intercalations. d)mutations.

Out of the seven main animal groups (fish, mammals, birds, insects, reptiles, amphibians, and arachnids), how many contain members with internal backbones? a. 5 b. 3 c. 7 d. 1

Plz ! ive been stuck on this forever

Wich organism obtains its energy from dead or decaying matter