1.

Question : (a) List two reasons for the appearance of variations among the progeny formed by sexual (b) reproduction. (i) Name the part marked 'A' in the diagram. (ii) How does 'A' reaches part 'B'? (iii) State the importance of the part 'C'. (iv) What happens to the part marked ‘D’ after fertilization is over?

Answer»

Solution :(a) (i) Involvement of two DIFFERENT individuals.
(ii) CREATION of new combination of variants.
(b) (i) POLLEN/pollen grain.
(ii) by POLLINATION/agents of pollination.
(iii)It (pollen tube) helps male GAMETE to reach egg (ovule).
(iv) Converts into embryo.


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