Answer:
B.) Smoking tobacco products or inhaling second-hand smoke
Explanation:
It can cause lung cancer
May i get brainlest please?
Genetic variation<span> is essential for </span>natural selection<span> because </span>natural selection can only increase or decrease frequency of alleles that already exist in the population.Genetic variation<span> is caused by: mutation
i pulled this off of the site i got the information from i hope this helps you out if not sorry
</span><span>
</span>
Answer:
Intraspecific Competition
Gaseous exchange..............
