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प्रश्न
Pollen grains are formed by ______ division in locules of anthers.
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उत्तर
Pollen grains are formed by meiotic division in locules of anthers.
Explanation:
Pollen grains are formed inside the locules (pollen sacs) of the anther. The diploid microspore mother cells (PMCs) present in the locules undergo meiotic division to produce haploid microspores. These microspores further develop into pollen grains.
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संबंधित प्रश्न
Write the functions of the following organs of reproduction:
a. Ovaries
b. Seminal vesicle and prostate glands
Name the human male reproductive organ that produces sperms and also secretes a hormone. Write the functions of the secreted hormone.
What are the female sex cells in humans called?
What do the ovaries in a woman produce?
What name is given to the fusion of sperm and ovum?
Mention two functions of human ovaries.
Draw a labelled diagram of the human male reproductive system. With the help of this diagram, describe the working of human male reproductive system?
The normal body cell of an organism contains 28 pairs of chromosomes. The number of chromosomes present in its germ cell will be:
Write the functions of secretions of prostate gland and seminal vesicles in humans.
List and explain in brief three methods of contraception.
Draw a diagram of human female reproductive system and label the part.
(i) That produces eggs.
(ii) Where fusion of egg and sperm take place.
(iii) Where zygote is implanted.
What happens to human egg when it is not fertilized?
Explain how the sex of the child is determined at the time of conception in human beings.
Gender of child is determined by the male partner of couple. Explain with reasons whether this statement is true or false.
Define the following:
Clone
Differentiate on the basis of what is indicated in brackets :
The prostate gland and Cowper’s gland (the nature of secretion)
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
A zygote is the product of the fusion of male and female gametes.
Choose the Odd One Out:
What is inhibin?
Reproductive organs are also considered endocrine glands.
Gestation period in man
