Answer:
both options 4 and 3 is the answer..
Dna replication so it replicates your DNA to occur
I think the correct answer from the choices listed above is option B. Keratin is the protein in mammals which shows only a primary and secondary structure. Keratin is a fibrous protein forming the structural constituent of hair, feathers, hoofs, claws and many others.
Ok. Any Questions? I'll be sure to answer
c. food production is the answer
