Will give : )

which of the following is used as evidence in supporting the idea that life changes over time?

a) the time period in which an embryo develops

b) the big bang theory

c) the existence of vestigial structures

d) the similarities in body systems such as the endocrine and nervous systems

check for the pregnancy rating of drug. if its class c or d see if other alternatives

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.