How do humans affect the carbon cycle? Using pencil to write, exhaling carbon dioxide, wearing sunscreen or inhaling oxygen?
NEED HELP ASAP

both

Explanation:

it a affects the carbon cycle both ways

answer: - b cells

explanation: -

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands