B. sexual selection, which alters allele frequencies in the gene pool.
Answer:
C
Explanation:
all of them have negative effects on the enviroment as a whole but C gives no reason why it would be a consequence
Hii! I believe the answer is D. The brown beetles were better able to survive to reproductive age and pass on their traits. (:
Explanation:
Digestion is important for breaking down food into nutrients, which the body uses for energy, growth, and cell repair. Food and drink must be changed into smaller molecules of nutrients before the blood absorbs them and carries them to cells throughout the body.