Answer:
The answer is number two extinction happened, this was the time dinosaurs went extinct ebcause lack of sun because oh how much dirt was blown into the earth atmosphere becuase of the asteriod, third option is talking about big bang theroy so that dosnt apply!
Explanation:
<span>Diffusion and osmosis are important to cells because they don't require energy to transport very important molecules such as water and steroids.</span>
The drug that is associated when having to intake it when
pregnant that is likely causing premature birth, low birth weight infants and
the fetal death is the use of nicotine. This type of drug is a form of agonist
in regards with nicotinic acetylcholone receptors.
