Question

A multicellular, filamentous alga exhibits a type of sexual life cycle in which the meiotic division occurs after the formation of zygote. The adult filament of this alga has

• A. haploid vegetative cells and haploid gametangia
• B. ​​haploid vegetative cells and diploid gametangia
• C. diploid vegetative cells and haploid gametangia
• D. diploid vegetative cells and diploid gametangia

Answer 1

The correct option is A haploid vegetative cells and haploid gametangia

Reproduction in algae:

Some algae undergo the haplontic life cycle where the vegetative phase is haploid and it predominates the diploid stage. The diploid stage is limited to the zygote which is short-lived.

Nature of the adult filament of algae:

Since the zygote undergoes meiosis, the adult filament of this algae has haploid vegetative cells and haploid gametangia.

Final answer:

d. haploid vegetative cells and haploid gametangia