39. How many of the structures given in the box are the products of fertilization?
Conidia, Zygospore, Oospore, Oosphere, Zoospore, Sperm, Ovum.
(a) Seven              (b) Three              (c) Five                 (d) Two

40. Select the odd one out w.r.t. external fertilization :
(a) Amphibians      (b) Fishes           (c) Most algae       (d) Spirogyra

Dear student,
The correct answer is (d). Only zygospore and oospore are the products of fertilization. Conidia are the spore formed by the fungal species at the top of the hypha asexually. Hence it cannot be the product of fertilization.

Zygospore is formed the nuclear fusion of two haploid gametes. Hence it is the product of fertilization.

Oospore is formed by fertilization of oosphere in algae and fungi. Hence it is the product of fertilization.

Oosphere is the female reproductive cell of the algae and fungi.

The zoospore is an asexual spore of fungi, algae and some protozoans.

Sperm and ovum are the female and male reproductive cell whose fusion leads to the formation of zygote. Hence are not the product of fertilization.

Kindly post another question separately to be answered by the experts.

Regards
 

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