A scientist at a nuclear power plant spills toxic chemicals on her hand. The chemical exposure results in a mutation to the DNA within her skin cells. which of the following is the most likely result of the mutation to the scientist’s skin cells? A. The damaged DNA spreads to every cell in the body

B. The size of the scientist’s skin cells decreases

C. The scientist’s offspring inherit the mutation from the affected cells

D. The sequence of amino acids with the affected cells is altered

c. genetic engineering

explanation:

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.

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?