Answer:
ring
Explanation:
ri
The sphincter is a ring of muscle surrounding and serving to guard or close an opening or tube
Answer:
C.
The other ones are benefits except B and C so there aren’t any concerns.
Answer:
One of these is natural selection, which is a process that increases the frequency of advantageous gene variants, called alleles, in a population. Natural selection can result in organisms that are more likely to survive and reproduce and may eventually lead to speciation.
Explanation:
Answer:
A
Explanation:
Were viruses ever alive? Most biologists say no. Viruses are not made out of cells, they can't keep themselves in a stable state, they don't grow, and they can't make their own energy. Even though they definitely replicate and adapt to their environment, viruses are more like androids than real living organisms.
Answer:
muscular system helps move the body
Explanation:
