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Human reproduction covers the male and female reproductive organs, gamete formation, fertilization, implantation and hormonal regulation. The menstrual cycle includes ovarian and uterine changes controlled by pituitary and ovarian hormones, while sexually transmitted diseases are studied through their causes, transmission, symptoms, prevention and effects on fertility.

Last updated 9 September 2026

Human Reproductive System Menstrual Cycle Sexually Transmitted Diseases

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1,220 questions · page 21 of 61

401. The process by which the sperms are produced is known as:

A. Ovulation
B. Spermatogenesis
C. Oogenesis
D. Gestation

Explanation: Spermatogenesis is the process by which sperm cells are produced in the male testes.

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402. The tube that carries the sperms out of the tests is the:

A. Vasa efferentia
B. Vas deferens
C. Oviduct
D. Epididymis

Explanation: Vas deferens also known as the ductus deferens, it is a muscular tube that transports sperm from the epididymis to the ejaculatory duct.

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403. The process by which the sperms are released is called:

A. Spermatogenesis
B. Oogenesis
C. Ovulation
D. Ejaculation

Explanation: Ejaculation is the process by which semen containing sperm is forcefully expelled from the male reproductive tract.

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404. The external genitalia in females is called:

A. Pubis
B. Vagina
C. Vulva
D. Clitoris

Explanation: The vulva refers to the external parts of the female genitalia. It includes the labia majora, labia minora, clitoris, vaginal opening, and…

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405. Sterilisation in males is called as:

A. Tubectomy
B. Vasectomy
C. IVF
D. GIFT

Explanation: Vasectomy is a surgical procedure for males, involving the cutting or blocking of the vas deferens, which are the tubes that carry sperm…

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406. Binary fission is seen in:

A. Mucor
B. Hydra
C. Amoeba
D. None of these

Explanation: Binary fission is the primary mode of reproduction in Amoeba, a single-celled organism.

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407. The endosperm nucleus is:

A. Haploid
B. Diploid
C. Triploid
D. Tetraploid

Explanation: The endosperm nucleus is triploid, containing three sets of chromosomes.

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408. The fertilization of human egg by the sperm takes place in:

A. Ovary
B. Oviduct
C. Vagina
D. Uterus

Explanation: Fertilization typically occurs in the oviduct, also known as the fallopian tube.

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409. Pollen tube contains:

A. One male nucleus
B. Two male nuclei
C. Three male nuclei
D. Four male nuclei

Explanation: This is the correct option. The pollen tube contains two male nuclei. One of these male nuclei fuses with the egg cell to form the zygote…

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410. If the pollen is transferred to the stigma of the same flower, it is called:

A. Allogamy
B. Autogamy
C. Cross pollination
D. Double fertilization

Explanation: Autogamy refers to the transfer of pollen from the anther to the stigma of the same flower.

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411. Pollen grains are produced by:

A. Ovary
B. Filament
C. Stigma
D. Anther

Explanation: The anther is the part of the stamen where pollen grains are produced through a process called microsporogenesis.

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412. The collective name for sepals is:

A. Androecium
B. Gynoecium
C. Corolla
D. Calyx

Explanation: The calyx refers to the collective term for all the sepals in a flower.

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413. The individual units of corolla are called:

A. Petals
B. Sepals
C. Stamens
D. Pistils

Explanation: The individual units of the corolla are called petals. Petals are the often colorful, leaf-like structures of a flower.

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414. The attachment of the embryo to the uterus is called:

A. Gestation
B. Fertilization
C. Implantation
D. Menstruation

Explanation: The attachment of the embryo to the uterus is called implantation. This is a crucial step in the early stages of pregnancy.

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415. The onset of the reproductive age is called:

A. Menstruation
B. Menarche
C. Menopause
D. Puberty

Explanation: Puberty is the stage of development during which adolescents reach sexual maturity and become capable of reproduction.

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416. The first time that the monthly bleeding occurs is called:

A. Maturity
B. Menarche
C. Menopause
D. Puberty

Explanation: The term monarche refers to the first occurrence of menstruation in a woman's life.

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417. The most important part of the plant for continuation of the life of the species is:

A. Stem
B. Root
C. Flower
D. Leaf

Explanation: Flowers are the reproductive organs of angiosperms (flowering plants). They contain structures such as the male stamen, which produces…

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418. The type of vegetative propagation seen in Chrysanthemum is:

A. Runner
B. Sucker
C. Stolon
D. Offset

Explanation: Chrysanthemums are propagated through suckers. Suckers are adventitious buds that develop from roots, and give rise to new plants.

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419. Successfully grafted plants bear the flowers and fruits characteristic of the:

A. Scion
B. Stock
C. Either scion or stock
D. A mixture of scion and stock

Explanation: The scion is the upper part of the graft union, usually consisting of a stem or bud from the desired plant species.

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420. Sugarcane is normally grown by:

A. Cutting
B. Grafting
C. Layering
D. Seeds

Explanation: Sugarcane is commonly propagated by planting stem cuttings from mature sugarcane stalks.

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