Short Answer TypeHow many chromosomes do drones of honeybee possess? Name the type of cell division involved in the production of sperms by them.
Why do moss plants produce very large number of male gametes? Provide one reason. What are these gametes called?
Mosses are bryophytes and they need water for fertilisation. During the transfer of male gametes, many of them are destroyed or lost. Thus, moss plants produce very large number of male gametes to compensate for the loss during transport.
These male gametes are called antherozoids.
(a) Select the homologous structures from the combinations given below :
(i) Forelimbs of whales and bats
(ii) Tuber of potato and sweet potato
(iii) Eyes of octopus and mammals
(iv) Thorns of Bougainvillea and tendrils of Cucurbita
(b) State the kind of evolution they represent.
(a) Why are the plants raised through micro-propagation termed as somaclones?
(b) Mention two advantages of this technique.
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