NCERT Solutions Class 10 Science Chapter 7 How do Organisms Reproduce

How do Organisms Reproduce is the seventh chapter of Class 10 Science, offering a comprehensive exploration of the process of reproduction in organisms. This chapter covers essential topics that help students understand the various modes of reproduction, from asexual to sexual reproduction, across different species. 

To aid your preparation, we provide Class 10 How Do Organisms Reproduce NCERT Solutions, to help you tackle the critical questions. Additionally, you can access the Class 10 Science Chapter 7 Question Answer PDF for a structured approach to solving the chapter's exercises. For a quick review, our NCERT Class 10 Science Chapter 7 Notes provide a concise summary of the key concepts.

1.0Download Class 10 Science Chapter 7 - How do Organisms Reproduce NCERT Solutions

This article provides Class 10 How Do Organisms Reproduce Solutions in accordance with NCERT guidelines. By practising these solutions, students can build a solid foundation in biology and enhance their problem-solving skills, which will help them achieve good scores in board exams. For a deeper understanding, students can download the NCERT Class 10 Science Chapter 7 PDF Solutions, meticulously prepared by ALLEN’s experts, from the link below.

2.0Class 10 Science Chapter 7 How Do Organisms Reproduce : Overview

Before getting into the details of NCERT Solutions For Class 10 Science Chapter 7 How do organisms reproduce, let's take a brief look at the topics and subtopics covered in this chapter of the NCERT Class 10 Science book.:

Topics covered in this chapter:

1. Do Organisms Create Exact Copies of Themselves? – This section explains how organisms pass on their genetic material to offspring, highlighting variations during reproduction.
2. Modes of Reproduction Used by Single Organisms – Asexual reproduction involves a single parent and results in offspring that are genetically identical to the parent. This method is common in simpler organisms. There are several types of asexual reproduction:

3. Sexual Reproduction – Sexual reproduction involves the union of two individuals, typically a male and a female, to create offspring. Unlike asexual reproduction, which requires only one parent and produces identical offspring, sexual reproduction involves genetic contributions from both parents, resulting in greater diversity among offspring.

3.0Class 10 Science Chapter 7 How do Organisms Reproduce NCERT : Detailed Solutions

1. Asexual reproduction takes place through budding in -

(1) Amoeba

(2) Yeast

(3) Plasmodium

(4) Leishmania

Ans. (2) Yeast

2. Which of the following is not a part of the female reproductive system in human beings?

(1) Ovary

(2) Uterus

(3) Vas deferens

(4) Fallopian tube

Ans. (3) Vas deferens

3. The anther contains -

(1) sepals

(2) ovules

(3) pistil

(4) pollen grains

Ans. (4) Pollen grains

4. What are the advantages of sexual reproduction over asexual reproduction?

Ans. (i) Sexual reproduction is better than asexual reproduction because it brings variation which is necessary to have in a population so in case of adversity of environment all the members do not die but members with suitable variation survive to save the population from getting extinct.

In asexual reproduction variations are very less.

(ii) These variations collected over a period of time lead to formation of new species.

5. What are the functions performed by the testes in human beings?

Ans. Testes are responsible for production of sperms and testosterone hormone.

6. Why does menstruation occur?

Ans. It occurs when the egg produced (in the female body) is not fertilized. So the thick and soft lining of the uterus breaks down, shedding blood along with mucus which comes out of vagina in the form of bleeding.

7. Draw a labelled diagram of the longitudinal section of a flower.

Ans.

8. What are the different methods of contraception?

Ans. Different methods of contraception can be classified into four categories:

(i) Barrier method in which sperms are prevented from coming in contact with ovum to avoid fertilization, this is used by males in the form of condoms and females in the form of cervical cap.

(ii) Chemical methods: Some hormonal pills are available for females which are hormonal preparation and inhibit the process of ovulation.

(iii)IUCD: They are Intra Uterine Contraceptive Devices which prevent the fertilization and implantation of embryos into the uterus.

(iv) Surgical methods: In males, vas deferens is cut and tied and in females, fallopian tubes are cut and tied so the sperms cannot come in contact with ovum to lead to fertilization.

9. How are the modes for reproduction different in unicellular and multicellular organisms?

Ans. In unicellular organisms the mode of reproduction is simple whereas it is very complex in case of multicellular organisms. Unicellular organisms reproduce by binary fission (e.g. Amoeba, Paramecium), multiple fission (e.g. Plasmodium), budding (e.g. Yeast) but multicellular organisms with simple body organisation reproduce by means of budding (e.g. Hydra), fragmentation (e.g. Spirogyra), regeneration (e.g. Hydra), vegetative propagation in all plants and sexual reproduction prominently in all higher plants and animals with complex body organisation.

10. How does reproduction help in providing stability to populations of species?

Ans. By reproduction variations are added in population, which may be suitable for some changing conditions of the environment. In case of environmental adversity , some of the members survive and prevent the entire population from vanishing off.

11. What could be the reasons for adopting contraceptive methods?

Ans. Contraceptive methods are adopted for one or more of following reasons:

(i) To maintain the population size by preventing unwanted pregnancy.

(ii) To maintain the gap between two children and to plan the family size.

(iii) To prevent sexually transmitted diseases.

(iv) Good reproductive health.

4.0Benefits of Studying this Chapter 

Here are the key benefits of studying the chapter "How Do Organisms Reproduce" in Class 10 Science:

1. Understanding Biological Processes: It provides a clear understanding of how different organisms reproduce, both asexually and sexually, which is fundamental to biology.
2. Foundation for Higher Studies: It builds a strong foundation in reproduction concepts, essential for further studies in biology, especially for competitive exams like NEET.
3. Clarity on Human Reproduction: The chapter introduces the basics of human reproductive systems, which is vital for understanding human biology and health education.
4. Development of Critical Thinking: By learning various reproduction methods, students enhance their analytical skills and ability to solve biological problems.
5. Real-World Relevance: It helps students connect biological concepts to real-world examples, such as plant reproduction in agriculture and animal breeding.
6. Board Exam Preparation: Mastering this chapter is important and has significant weightage, so it is essential to securing good marks in board exams.