Question

1. what effects did oxygen have on the developing atmosphere? select all that apply. increase in anaerobic organisms decrease in anaerobic organisms increase in aerobic organisms increase in multicellular organisms decrease in multicellular organisms

Explanation:

Oxygen is toxic to anaerobic organisms, so its presence leads to a decrease in them. Aerobic organisms require oxygen for respiration, so oxygen causes an increase in them. Also, the availability of oxygen through aerobic respiration provided more energy which facilitated the evolution and increase of multicellular organisms.

Answer:

B. decrease in anaerobic organisms
C. increase in aerobic organisms
D. increase in multicellular organisms