Which of the following cell gives rise to the male gametes in flowering plants?

Polar nucleus

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Generative Nucleus

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Tube nucleus

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All of the above

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Solution

The correct option is B
Generative Nucleus

The pollen grain contains two nuclei - the generative nucleus and the tube nucleus. The pollen tube develops from the pollen that falls on the stigma and grows towards the ovary. The nucleus in the pollen also enters the pollen tube. The generative nucleus divides in the pollen tube to produce two male gametes and the tube nucleus disintegrates.

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Q. Male nucleus of flowering plant fuses with the egg nucleus in

The generative nucleus in the pollen grain develops into two male gametes.

Q. Match the following.

	LIST I		LIST II
A	Generative nucleus	1	Pollen tube
B	Germ pore	2	Endosperm nucleus
C	Exine	3	Testa
D	Secondary nucleus	4	Fertilization
E	Integument	5	Male nuclei
F	Egg nucleus	6	Rough

Q. Male gametes in diploid maize plants have 10 chromosomes in their nucleus. What would be the number of chromosomes in its female gamete, zygote and the cells of the seedling respectively?

Fill in the following blanks with suitable words :
(a) Pollen grains contain ___ gametes of a plant.
(b) Ovules contain ___ gametes of a plant.
(c) The ovary of a flower becomes ___ after fertilisation.
(d) The ovule becomes a ___ after fertilisation.
(e) Flowering plants reproduce by ___ method of reproduction.
(f) The female organ of reproduction in the flower is the ___
(g) The male organ of reproduction in the flower is the ___
(h) The name of the structure in the flower in which the male gamete is formed is ___
(i) The ___ at the base of the carpel contains egg cells.
(j) The term used to refer to the transfer of pollen from the stamen of one flower to the carpel of another flower of the same species is ___
(k) The cells involved in sexual reproduction are called ___
(l) Fusion of gametes gives rise to a single cell called ___
(m) The process of fusion of gametes is called ___
(n) A multicellular animal starts its life from a ___ through sexual reproduction.
(o) The union of a sperm nucleus with an egg nucleus is known as ___ and results in a ___
(p) The menstrual cycle is controlled by ___

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