15 extra multiple-choice questions for Reproduction in Plants and Animals (10th Standard Science, Samacheer Kalvi), beyond the ones printed in the textbook — each with the correct option highlighted and a clear, worked explanation. Free to read in English and Tamil.
Q1
Reproduction in which a parent organism splits into two or more daughter cells is called
- A. FissionCorrect
- B. Budding
- C. Fragmentation
- D. Regeneration
Explanation. Many bacteria and protozoa simply divide into two or more daughter cells, and this mode is called fission. Budding and fragmentation involve outgrowths or broken pieces instead.
Q2
An organism that can grow back into complete individuals when broken into pieces is
- A. Yeast
- B. HydraCorrect
- C. Amoeba
- D. Bacteria
Explanation. Hydra regenerates if it is broken into pieces, and it can also give out buds that mature into new individuals. This capacity for regeneration is the point being tested.
Q3
The transfer of pollen grains from the anther to the stigma of the same flower is called
- A. Cross pollination
- B. Anemophily
- C. Self pollinationCorrect
- D. Entomophily
Explanation. Self pollination occurs when pollen reaches the stigma of the same flower. Cross pollination carries pollen to a different flower, and anemophily and entomophily name the agents.
Q4
Pollination brought about by insects is known as
- A. Anemophily
- B. Hydrophily
- C. Zoophily
- D. EntomophilyCorrect
Explanation. Entomophily is pollination by insects. Such flowers are usually coloured, scented and produce nectar, all of which attract the insect that carries the pollen.
Q5
After fertilization the ovary of a flower develops into the
- A. Seed
- B. FruitCorrect
- C. Embryo
- D. Endosperm
Explanation. The ovary matures into the fruit while the ovules inside it become the seeds. The fertilized egg develops into the embryo within the seed.
Q6
The protective outer whorl of a flower is the
- A. CalyxCorrect
- B. Corolla
- C. Androecium
- D. Gynoecium
Explanation. The calyx, made of sepals, is the outermost whorl and protects the flower in the bud stage. The corolla lies within it and attracts pollinators.
Q7
The formation of sperms in the male and ova in the female is together called
- A. GametogenesisCorrect
- B. Fertilization
- C. Implantation
- D. Parturition
Explanation. Gametogenesis is the general term covering spermatogenesis, the formation of spermatozoa, and oogenesis, the formation of ova.
Q8
The male hormone testosterone is secreted by
- A. Sertoli cells
- B. Leydig cellsCorrect
- C. Spermatogonia
- D. Epididymis
Explanation. Leydig cells, also called interstitial cells, lie between the seminiferous tubules and secrete testosterone. Sertoli cells instead nourish the developing sperms.
Q9
The cyclic events taking place in a rhythmic manner during the reproductive period of a woman's life are called the
- A. Ovarian cycle only
- B. Menstrual cycleCorrect
- C. Cell cycle
- D. Cardiac cycle
Explanation. The menstrual cycle is the set of cyclic events occurring rhythmically through the reproductive period of a woman's life, preparing the body for a possible pregnancy.
Q10
The attachment of the blastocyst to the uterine wall is known as
- A. Ovulation
- B. Gestation
- C. ImplantationCorrect
- D. Parturition
Explanation. Implantation is the process by which the blastocyst attaches to the endometrium, the lining of the uterine wall, so that development can continue.
Q11
The temporary association between the developing embryo and the maternal tissues is the
- A. PlacentaCorrect
- B. Amnion
- C. Corpus luteum
- D. Endometrium
Explanation. The placenta is a temporary association formed between the developing embryo and the maternal tissues, through which nutrients and oxygen are supplied to the embryo.
Q12
The expulsion of the young one from the mother's uterus is called
- A. Implantation
- B. ParturitionCorrect
- C. Ovulation
- D. Gestation
Explanation. Parturition is the act of expelling the fully developed young one from the mother's uterus at the end of the gestation period.
Q13
In angiosperms, the fusion of one male gamete with the egg and the other with the polar nuclei is called
- A. Syngamy
- B. Triple fusion only
- C. Double fertilizationCorrect
- D. Parthenogenesis
Explanation. Double fertilization names the combined event: syngamy produces the zygote, and triple fusion produces the endosperm. Both occur in the same embryo sac in angiosperms.
Q14
Which of the following is a method of vegetative propagation by an underground stem?
- A. GingerCorrect
- B. Bryophyllum
- C. Yeast
- D. Hydra
Explanation. Ginger is an underground stem that bears buds and grows into new plants. Bryophyllum propagates through its leaves, while yeast and Hydra are not plants.
Q15
Devices and methods used to prevent unwanted pregnancy are called
- A. Contraceptive devicesCorrect
- B. Diagnostic devices
- C. Prosthetic devices
- D. Regenerative devices
Explanation. Contraception is one of the best birth control measures, and the devices used for it are called contraceptive devices. They prevent pregnancy rather than diagnose or replace anything.
Frequently asked questions
How many MCQs are there in Reproduction in Plants and Animals?
This chapter has 15 book-back multiple-choice questions, each with the correct answer and a step-by-step explanation.
Are these 10th Standard Science MCQs free to practise online?
Yes. Every question, answer and explanation here is free, and you can also take them as a timed practice test.
Where can I find the Reproduction in Plants and Animals book-back answers?
The correct option for each question is highlighted on this page with a worked explanation, plus a quick answer-key summary at the top.
