Answer:
C
activates a chemotaxic response in certain phagocytic cells
The "Rr" is heteroyzgous red
The "RR" is homozygous dominant
The "rr" is homozygous recissevie
<span>When the surface layer was dug up, the permafrost was exposed. When the weather warmed, this exposed permafrost would have melted and become soggy, causing the ground underneath the tracks to shift.</span>
