Question

Reduced size of one of the daughter cell in diatom formed during division is restored by ___________which has _________ ploidy

• A. Statospore, N
• B. rejuvenescent cell, N
• C. Statospore, 2N
• D. Auxospore, 2N

Answer 1

The correct option is D Auxospore, 2N

Repeated division due to a sexual reproduction causes a decrease in the size of the diatoms upto a limit where no further division can take place. the size of the cell is restored by sexual reproduction with the formation of auxospores help in increasing the size of the zygote to form a normal vegetative cell. Two haploid gametes fuse together to form a diploid zygote (2N) which is enlarged to normal size with the help of auxospores.

So the correct answer is ' Auxospores, 2N'.