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How do Organisms Reproduce?

Madhya Pradesh Board · Class 10 · Science

NCERT Solutions for How do Organisms Reproduce? — Madhya Pradesh Board Class 10 Science.

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A detailed labeled diagram showing the internal and external organs of the human male reproductive system, including testes, epididymis, vas deferens, seminal vesicle, prostate gland, bulbourethral gl
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23 Questions Solved · 4 Sections

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Q U E S T I O N S

1What is the importance of DNA copying in reproduction?Show solution
DNA copying is important because it passes the hereditary information from parents to the next generation. It also helps make new cells with the same basic body design. Small variations may occur during copying, and these variations are the basis of evolution and help species survive changing conditions.

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2Why is variation beneficial to the species but not necessarily for the individual?Show solution
Variation is beneficial to the species because if conditions change, at least some individuals may survive and reproduce. But variation is not always beneficial to an individual because some changes may be harmful and the individual may die or fail to function properly.

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Q U E S T I O N S

1How does binary fission differ from multiple fission?Show solution
In binary fission, one unicellular organism splits into two daughter cells. In multiple fission, the parent cell divides at the same time to form many daughter cells at once, as in *Plasmodium*.

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2How will an organism be benefited if it reproduces through spores?Show solution
An organism reproducing through spores is benefited because spores have thick protective walls, so they can survive unfavorable conditions and remain dormant until they reach a moist surface. They are also produced in large numbers, helping the species spread widely.

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3Can you think of reasons why more complex organisms cannot give rise to new individuals through regeneration?Show solution
More complex organisms cannot give rise to new individuals through regeneration because their bodies have specialised tissues, organs, and organ systems arranged in a fixed way. Simple cell-by-cell regrowth would not rebuild this complex organisation properly, so regeneration is not a practical normal mode of reproduction for them.

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4Why is vegetative propagation practised for growing some types of plants?Show solution
Vegetative propagation is practised because it allows plants like banana, orange, rose and jasmine to be multiplied easily, quickly, and in disease-free conditions. It also helps plants that have lost the capacity to produce seeds, and the new plants are genetically similar to the parent and retain its desirable characteristics.

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5Why is DNA copying an essential part of the process of reproduction?Show solution
DNA copying is essential because reproduction must pass the genetic information of the parent to the new individual. Without copying DNA, the new cell would not receive the instructions needed for its body design and life processes. DNA copying also allows variation, which is important for survival and evolution.

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Q U E S T I O N S

1How is the process of pollination different from fertilisation?Show solution
Pollination is the transfer of pollen grains from the anther to the stigma. Fertilisation is the fusion of the male germ-cell from the pollen with the female gamete in the ovule, forming a zygote.

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2What is the role of the seminal vesicles and the prostate gland?Show solution
The seminal vesicles and prostate gland add secretions to the sperms. These secretions make the sperms' transport easier and also provide nutrition to them.

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3What are the changes seen in girls at the time of puberty?Show solution
At puberty in girls, breasts enlarge, the skin of the nipples darkens, and menstruation begins. Hair also grows in new parts of the body such as the armpits and the genital region.

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4How does the embryo get nourishment inside the mother's body?Show solution
The embryo gets nourishment from the mother's blood through the placenta. The placenta provides a large surface area for the transfer of glucose and oxygen to the embryo and also removes waste substances from the embryo into the mother's blood.

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5If a woman is using a copper-T, will it help in protecting her from sexually transmitted diseases?Show solution
No. A copper-T prevents pregnancy, but it does not protect against sexually transmitted diseases. The chapter says condoms help prevent the transmission of many such infections to some extent.

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E X E R C I S E S

1Asexual reproduction takes place through budding in
2Which of the following is not a part of the female reproductive system in human beings?
3The anther contains
4What are the advantages of sexual reproduction over asexual reproduction?
5What are the functions performed by the testis in human beings?
6Why does menstruation occur?
7Draw a labelled diagram of the longitudinal section of a flower.
8What are the different methods of contraception?
9How are the modes for reproduction different in unicellular and multicellular organisms?
10How does reproduction help in providing stability to populations of species?
11What could be the reasons for adopting contraceptive methods?

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Frequently Asked Questions

What are the important topics in How do Organisms Reproduce? for Madhya Pradesh Board Class 10 Science?
Key topics in How do Organisms Reproduce? include Types of Reproduction Overview, Complete Overview of Reproduction, Reproduction in Living Organisms - Complete Overview. These are the concepts Madhya Pradesh Board Class 10 examiners draw on most — study them first, then practise related questions.
How to score full marks in How do Organisms Reproduce? — Madhya Pradesh Board Class 10 Science?
Understand the core concepts first, then work through the 63 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.
Where can I get free NCERT Solutions for How do Organisms Reproduce? Class 10 Science?
This page has free step-by-step NCERT Solutions for every exercise question in How do Organisms Reproduce? (Madhya Pradesh Board Class 10 Science) — written the way examiners award marks: given, formula, working, answer.

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