Pasteur used tipped and untipped sterilized S-shaped flaks of broth in an attempt to A. determine how ozone forms in the atmosphere

B. find out whether the conditions of ancient earth could have formed complex organic compounds

C. demonstrate the principle of biogenesis

D. disprove the notion of spontaneous generation

The answer would be abrasion.

Ithink it's c (70)

Hmm this is a hard heterotroph's can't produce its own food. a human can produce it's own food because people kill animals and eat them like squirrel, deer, oak trees need rain which they don't produce the rain, bee's need flowers and pollen and nectar but they don't produce it either, rabbit's don't produce either, because they either steal carrots from your garden and eat leaves.so, the best answer that i would pick is a. humanshope my answer has you and sorry if it doesn't : ) : (

Ibelieve the answer is a. may reveal greater unknown complexities.hope my answer has you : )