Answer: natural selection
C.) Antigen on the red blood cells
<span>A shelled, water-retaining egg with four membranes that enables reptiles, birds, and egg-laying mammals to complete their life cycles on dry land</span>
Answer:
tRNA
Explanation:
tRNA goes into the cytoplasm attaching to anticodons and bringing them back to the ribosomal unit where it attaches to the mRNA.
Answer: C
The substance that must come through the cell membrane for the cell to live is nutrients. Cells would die if they did not get nutrients. Nutrients are what keeps the cell running.
