Which of the following is the best scientific evidence that mammals evolved from reptiles?

A.
Similarities in the diets of extinct reptiles and modern mammals

B.
Amino acid sequences between the two show 95% molecular similarities

C.
Fossils of ancient reptiles and mammals that appear together in the same layers of rock

D.
Similarities in the average lifespans of modern reptiles and modern mammals

i think its the first one

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.