Class 8 Science Practice Set: Chapter 09 Reproduction in Animals
Review targeted practice sets for Class 8 Science Chapter 09 Reproduction in Animals. Built according to official educational guidelines for the 2026-27 academic year, these downloadable worksheets support daily revision and core concept reinforcement.
Download Chapter 09 Reproduction in Animals Worksheet PDF
Access the complete worksheet PDF for Chapter 09 Reproduction in Animals below. Regular practice with these targeted questions builds familiarity with standard exam patterns and helps secure higher marks in final Science evaluations.
A. True or False (Check Point)
1. Testes are two in number. 2. The development of the baby takes place inside the cervix. 3. Menstruation takes place from puberty to menopause. 4. The amniotic membrane surrounds the uterus. 5. Childhood lasts up to 20 years of age.
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Answer: 1. True; 2. False (it develops in the uterus); 3. True; 4. False (it surrounds the embryo or foetus); 5. False (childhood is about 2 to 12 years).
Teacher's Note: The cervix is the lower neck of the uterus.
B. Keywords
2. Define: asexual reproduction, cell differentiation, fertilization, metamorphosis, menstruation and reproduction.
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Answer: Asexual reproduction: producing offspring from one parent without gametes. Cell differentiation: the change of identical cells into specialised cells for different jobs. Fertilization: the fusion of a sperm and an ovum. Metamorphosis: a change in form from larva to adult, as in a frog or butterfly. Menstruation: monthly bleeding when the unused uterine lining is shed. Reproduction: making new individuals of the same species.
Teacher's Note: Learn these as one-line definitions.
C. Multiple Choice Questions
(i) Which is not an organ of the male reproductive system? (a) testes (b) epididymis (c) cervix (d) vas deferens
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Answer: (c) Cervix.
Teacher's Note: The cervix belongs to the female system.
(ii) The vas deferens transports sperms from the epididymis to ____ (a) urethra (b) ureter (c) penis (d) testes
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Answer: (a) Urethra.
Teacher's Note:
(iii) Which part stores sperms? (a) epididymis (b) vas deferens (c) seminal vesicles (d) penis
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Answer: (a) Epididymis.
Teacher's Note: Sperms mature and are stored here.
(iv) Each ovary produces ____ ovum every month. (a) one (b) two (c) three (d) four
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Answer: (a) One.
Teacher's Note: The ovaries usually take turns.
(v) The release of a mature ovum from the ovary is called ____ (a) fertilization (b) menstruation (c) ovulation (d) none
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Answer: (c) Ovulation.
Teacher's Note:
D. Fill in the Blanks
1. The testes are in a skin sac called ____. 2. Each ovary produces one mature ____ every month by a process called ____. 3. The ____ is attached to the ____ by the placenta. 4. There are two ____ in the abdominal cavity on either side of the ____. 5. ____ is the first stage of growth after birth.
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Answer: 1. scrotum; 2. ovum, ovulation; 3. foetus (embryo), uterus wall; 4. ovaries, uterus; 5. Infancy.
Teacher's Note: The scrotum keeps the testes slightly cooler than the body.
E. True or False
1. The penis is the male internal sex organ. 2. Fallopian tubes are two in number and lead to the uterus. 3. The vas deferens carries sperms from the epididymis to the urethra. 4. During menopause, menstrual periods stop. 5. The developing organism in humans is called a foetus till the end of the second month.
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Answer: 1. False (it is external); 2. True; 3. True; 4. True; 5. False (it is an embryo for the first two months, then a foetus).
Teacher's Note: Embryo first, foetus later.
F. Sequences
10. Arrange in the correct sequence: (1) Childhood, Adolescence, Adulthood, Infant (2) Ovulation, Fertilization, Pregnancy, Implantation, Birth.
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Answer: (1) Infant, Childhood, Adolescence, Adulthood. (2) Ovulation, Fertilization, Implantation, Pregnancy, Birth.
Teacher's Note: The labelled picture of the female reproductive system in the worksheet is not reproduced; its parts are explained in long question 3.
G. Very Short Answer Questions
1. Define fertilization.
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Answer: The fusion of a male gamete (sperm) with a female gamete (ovum) to form a zygote.
Teacher's Note:
2. What is external fertilization?
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Answer: Fertilization that happens outside the female's body, usually in water, as in fish and frogs.
Teacher's Note:
3. Name the main organs of (i) the male and (ii) the female reproductive system.
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Answer: (i) Testes, epididymis, vas deferens, seminal vesicles, urethra and penis. (ii) Ovaries, fallopian tubes, uterus and vagina.
Teacher's Note:
4. Which part of the male reproductive system stores sperms?
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Answer: The epididymis.
Teacher's Note:
5. Mention any two (i) male hormones (ii) female hormones.
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Answer: (i) Testosterone and androgens. (ii) Oestrogen and progesterone.
Teacher's Note: Hormones control the changes at puberty.
H. Short Answer Questions
1. Differentiate between external and internal fertilization.
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Answer:
| External | Internal |
|---|---|
| Happens outside the body of the female, in water | Happens inside the body of the female |
| Many eggs and sperms are released; many are wasted | Few eggs are released; little waste |
| Seen in fish and frogs | Seen in humans, birds and mammals |
Teacher's Note:
2. What is the function of the epididymis?
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Answer: It stores sperms and helps them to mature, and passes them to the vas deferens.
Teacher's Note:
3. Define semen.
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Answer: Semen is the white fluid containing sperms and the secretions of the seminal vesicles and other glands, released by the male during ejaculation.
Teacher's Note:
4. What do you mean by pregnancy?
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Answer: Pregnancy is the period (about nine months) in which a developing embryo and foetus grows inside the uterus of the mother.
Teacher's Note:
5. Write the functions of (i) uterus (ii) scrotum (iii) umbilical cord.
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Answer: (i) The uterus holds and nourishes the developing baby. (ii) The scrotum holds the testes outside the body at a lower temperature. (iii) The umbilical cord joins the foetus to the placenta and carries food and oxygen to it and waste from it.
Teacher's Note:
I. Long Answer Questions
1. What is reproduction? Differentiate between sexual and asexual reproduction with examples.
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Answer:
| Sexual | Asexual |
|---|---|
| Two parents (male and female) and gametes | One parent, no gametes |
| Offspring differ from parents | Offspring are identical |
| Slow | Fast |
| Examples: humans, dogs, birds | Examples: Amoeba (fission), Hydra (budding) |
Teacher's Note: Reproduction is making new individuals of the same kind.
2. Explain the male reproductive system.
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Answer: The main parts are: two testes in the scrotum, which make sperms and the hormone testosterone; the epididymis, which stores sperms; the vas deferens, which carries sperms to the urethra; seminal vesicles and prostate gland, which add fluid to form semen; and the urethra and penis, which pass semen out of the body.
Teacher's Note: Draw a neat diagram and label these parts.
3. What are the main organs of the female reproductive system? Explain.
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Answer: The two ovaries produce one ovum every month and the hormones oestrogen and progesterone. Two fallopian tubes carry the ovum to the uterus and are the site of fertilization. The uterus is a pear-shaped organ where the baby grows. The cervix is its narrow lower end, and the vagina is the passage to the outside.
Teacher's Note: Fertilization happens in the fallopian tube.
4. What is the placenta? Mention its functions.
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Answer: The placenta is a disc-shaped tissue that grows on the uterus wall during pregnancy and is joined to the foetus by the umbilical cord. It supplies oxygen and food to the foetus, removes carbon dioxide and wastes, and acts as a barrier against most harmful germs.
Teacher's Note: It is the link between mother and baby.
5. Explain the physical changes during infancy, childhood and adulthood.
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Answer: Infancy (birth to about 2 years): fast growth in height and weight, milk teeth appear and the baby starts crawling and walking. Childhood (about 2 to 12 years): steady growth, and milk teeth are replaced by permanent teeth. Adolescence (about 12 to 18 years): puberty brings a growth spurt, voice changes, facial hair in boys and menstruation in girls. Adulthood: growth stops and the body is fully developed.
Teacher's Note: Puberty is the start of adolescence.
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Exam Preparation Worksheet for Class 8 Science Chapter 09 Reproduction in Animals
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