Question

37. When an insect sits on the flower of a plant then some particles A present the top of little stalks in
the flower attach to its body hair. When this insect now sits on the flower of another similar
plant, then particles A attached to the hair of insect are put on the top of a flask shaped organ at
the centre of the flower. The particle A grows a long tube B from the top of the flask shaped
organ through which C moves down and reaches the bottom part of flask shape organ. Hence
fuses with the nucleus of D contained in structure E. the fusion of C and D forms new cell F which
grows and develops into a seed of plant.
a) What are particles A? what is the process of transferring A from one flower to another flower of
similar plant by the insect is known as?
b) What is name of tube B?
c) What is C which moves down through the B?
d) Name D and E.
e) What is f?​

Answer 1

a)A refers to the pollen grains of of the anther of the flower.

The process of transferring it by the insect is called cross -pollination.

b)The tube is known as pollen tube which grows through the style of the carpel.

c)C refers to the male gametes -Generative nucleus & tube nucleus.

d) D refers to the female gamete - egg cell(ovule)

E refers to the ovary of the female reproductive part.

e)F refers to the new cell called the zygote.

Explanation:

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