What would happen if there was no greenhouse effect? a) the sun's heat would be scattered back into space and would not reach earth. b) earth's atmosphere would be much cleaner, because there would be no pollutants. c) global warming would cause glaciers and the polar ice caps to melt, flooding low lying regions. d) the average temperatures on earth would be much lower and many ecosystems would not survive.

Definitely D You were right

Explanation:

the man is bald so he has no hair to get wet

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.