Which of the following characteristics differentiates an autotroph from a heterotroph? a. a heterotroph can only obtain its energy from an autotroph. b. an heterotroph can only obtain its energy from a heterotroph. c. an heterotroph must obtain its energy from a heterotroph or other autotroph heterotrophs only obtain their energy from the sun. d. a heterotroph must obtain its energy from a autotroph or other heterotroph. autotrophs only obtain their energy from the sun.

I believe the answer is D. A heterotroph must obtain its energy from a autotroph or other heterotroph. Autotrophs only obtain their energy from the Sun.

Autotroph consist of organism that capable of doing photosynthesis so they could produce their own food. Heterotroph is organism that couldn't produce food. They have to take the food from other organism. When heterotroph take food from plants/autotroph they will be similar to herbivore. When heterotroph take food from other heterotroph they will be similar carnivore

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.

the actual answer was 160934