What factors contribute to the effect an environmental toxin has on the human body?

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.

a) carbon, hydrogen

b) carbon, hydrogen, oxygen, nitrogen

c) carbon, hydrogen, oxygen, nitrogen, phosphorus

d) sugar

e) amino acid

f) nucleotide

(nitrogen fixation) will be your answer sorry if im wrong

answer; the male's sperm cells have mitochondria, but because the sperm contributes dna but no cytoplasm, no mitochondria are passed to the egg at ferilization;