Answer:
Explanation:
Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population.
ORR
Struggle for existence, variation and inheritance. These are said to be the necessary and sufficient conditions for natural selection to occur.
D would be the answer tomthis
Put a end to aggressively
The identify of the four DNA nucleotides is based on b) covalent bonds.