It is C) cell-mediated response
Answer:
ice age/ Quaternary glaciation
Explanation:
Ice ages have occurred in the earth history and do occur more or less regularly in a cycle. It is believed that ice ages are as a result of small changes in the earth's orbit and also dependent on the solar cycles. The temperatures on the earth reduce causing the ice sheets in the poles to extend to the subtropics.
The Hardy-Weinberg principle is used to characterize the distribution of the different genotype frequencies in a population which are not evolving. In the Hardy-Weinberg equation,
the frequency of the homozygous dominant genotype is denoted by
;
the frequency of the homozygous recessive genotype is denoted by
;
the frequency of the heterozygous genotype is denoted by 2pq;
the frequency of the recessive allele is denoted by q;
the frequency of the dominant allele is denoted by p.
An ecosystem is like a machine that cycles matter by using: captured energy.
Hope this helps (:
Answer: the answer is (d)
Explanation: