My guess would be c
Hope this helps
Aphotic zone: It is an inky darkness that occupies the great bulk of the ocean.
Photic zone: its a surface layer that receives sunlight.
Homozygous dominant allele is RR
Answer:
Protein
Explanation:
A protein is a naturally occurring, extremely complex substance that consists of amino acid residues joined by peptide bonds. Proteins are present in all living organisms and include many essential biological compounds such as enzymes, hormones, and antibodies.
