In these figures, two life-cycles are described. Mark the correct option.

Options

A. A represents primitive life forms and B represents more advnced life forms.
B. A represents terrestrial life forms and B represents aquatic life forms.
C. A rrepresents asexual reproduction and B represents sexual reproduction.
D. Both flow charts basically represent the same life-cycle.

Answer

a

Explanation

In A type of life cycle, the haploid organisms (n) given rise to haplioid gametes, which fuse to form diploid zygote (2n). Meiosis occurs in zygote at the time of germination and is producing haploid individuals. Such kind of the life cycle is called haplontic and is primitive and exhibited in lower groups of plants such as certain algae. In life cycle B, the diploid individual (2n) produces haploid gamets (n) by meiosis, which fuse to form diploid zygote (2n). This is diplontic life cycle in which haploid gametopyhtic somatic phase gets eliminated through progressive evolution. this kind of life cycle is exhibited by higher plants such as gymnosperms and angiosperms.