The size of a mouse population in a natural ecosystem tends to remain relatively constant due to
O the carrying capacity of the environment
o the lack of natural predators
O cycling of energy
increased numbers of decomposers
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C) A + T = G + C

Explanation:Erwin Chargaff suggested the rule of the base pairing of DNA structure which is that purine binds pyrimidine or adenine binds thymine and guanine binds cytosine. The composition of adenine and thymine and guanine and cytosine equals 100 percent.

In the given question, since option C shows that A binds T and G binds C and their composition equals 100%, therefore, Option-C is the correct answer.

Thus, Option-C is the correct answer.