A piece of virus DNA that becomes a part of a bacterium's genome is called a a) prophage

b) bacteriophage

c) endospore

d) retrovirus

a) prophage

Explanation: triggered to become active with exposure to radiation, heat, a particular chemical, or some other factor

the electromagnetic energy from the sun arrives in the form of visible and invisible light.

the most common type of reef is the fringing reef. this type of reef grows seaward directly from the shore. they form borders along the shoreline and surrounding islands.