A) Humans collected the oil from the surface of the water and along the coastline.
B) Artificial bioremediation, crude-oil eating microbes were poured into the ocean.
C) Natural bioremediation by microbes already present in the ocean.
D) Both human collection of oil and artificial bioremediation.
E) The crude oil still has not been cleaned up.

A) competition for limited resources
B) cooperation in utilization of resources
C) microbes living in the same environment without harming each other
D) microbes producing products that interfere with the growth of others
E) competition and producing products that interfere with growth

A) The conversion of dead organisms into fossil fuel.
B) The release of carbon dioxide by cellular respiration.
C) The conversion of carbon dioxide into organic molecules.
D) The storage of carbon compounds by heterotrophs.
E) The release of carbon dioxide by combustion.