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NCERT Solutions for Class 10 Science Chapter 7 How do Organisms Reproduce?
Edited By Irshad Anwar | Updated on May 21, 2025 12:16 PM IST | #CBSE Class 10th
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As per the CBSE Syllabus 2025–26, this chapter has been renumbered as Chapter 7.
NCERT Solutions for Class 10 Science Chapter 7 help students to compare their answers with expert-written answers, so that it becomes simpler to understand what is required. This chapter describes how living things reproduce and why reproduction occurs. Students learn about two broad categories of reproduction: asexual and sexual. Asexual reproduction is done with a single parent and involves activities such as budding and fission. Sexual reproduction is done using two parents, and male and female cells fuse. NCERT Solutions are an effective method of acquiring knowledge about reproduction in organisms.
This Story also Contains
- NCERT Solutions for Class 10 Science Chapter 7 How do Organisms Reproduce - Download PDF
- Detailed Answers to Science NCERT Class 10 Chapter 7: How do Organisms Reproduce? (Intext Questions)
- Access Answers to NCERT Solutions Class 10 Science Chapter 7 How do Organisms Reproduce (Chapter-End Exercise)
- Topics and Subtopics of Class 10 Science Chapter 7
- Approach to Solve NCERT Solutions for Class 10 Science Chapter 7 "How Do Organisms Reproduce?"
- Important Question of Chapter 7 How do Organisms Reproduce?
- CBSE NCERT Solutions for Class 10 Science - Chapter-wise
The step-by-step answers in the NCERT Solutions for Class 10 Science provide students with a clear way to test their basic knowledge and understanding. The solutions are done by experts and written in simple language so that the concepts can easily be understood. The solutions help students to learn the key concepts and do well in exams. This makes the NCERT Solutions for Class 10 Science Chapter 7 How do Organisms Reproduce a good study material for students.
NCERT Solutions for Class 10 Science Chapter 7 How do Organisms Reproduce - Download PDF
The downloadable PDF of the questions with detailed answers is given below :
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Detailed Answers to Science NCERT Class 10 Chapter 7: How do Organisms Reproduce? (Intext Questions)
Clear and well-explained solutions to all the in-text questions to help you understand the concepts more easily and improve your exam preparation are provided below:
Topic 7.1 Do organisms create exact copies of themselves
Page Number 114
Q. 1. What is the importance of DNA copying in reproduction?
Answer:
The importance of DNA replication in reproduction is as follows:
It allows offspring to inherit traits from their parents.
It helps keep the species' characteristics the same over time.
It produces variation within a species, which is critical for adapting and evolving.
Q. 2. Why is variation beneficial to the species but not necessarily for the individual?
Answer:
Variation is useful to a species as it allows some individuals to adapt to changes in their environment, which helps the survival of the species. As an example, if there were an outbreak of disease, those with genetic resistance would be able to survive and reproduce. Variation, though, is not always profitable to an individual, as certain differences could make survival more difficult for some organisms.
Topic 7.2 - Modes of Reproduction Used by Single Organisms
Page Number 119
Q. 1. How does binary fission differ from multiple fission?
Answer:
The difference between binary fission and multiple fission are given below:
Binary Fission | Multiple Fission |
One organism splits into two equal parts. | One organism divides into many smaller parts. |
Common in bacteria. | Seen in some protozoa like Plasmodium. |
Simple and quick division. | More complex division results in many individuals at once. |
Q. 2. How will an organism benefit if it reproduces through spores?
Answer:
Spore reproduction is a successful mode of survival and spreading in unfavourable conditions.
Spores can resist extreme conditions because of the covering walls.
They spread conveniently over distances, enabling the organism to grow in new areas.
Answer:
Regeneration is common in simpler organisms but is limited in complex organisms because of their body structure.
Complex organisms have specialised cells and tissues that make regeneration difficult.
Simpler organisms with less specialised systems can regenerate whole individuals more easily.
Q. 4. Why is vegetative propagation practised for growing some types of plants?
Answer:
Vegetative propagation is a method of asexual reproduction used in plant cultivation of desirable traits on an economic scale.
It guarantees rapid growth and retains the traits of the parent plant.
It can be used for crops that have improved yield or disease resistance.
Q. 5. Why is DNA copying an essential part of the process of reproduction?
Answer:
DNA replication ensures the passing on of genetic information during reproduction for species continuity and adjustment.
It makes children inherit traits from their parents, making species characteristics consistent.
Mutations in DNA replication help species adapt and evolve with changing environments.
Topic 7.3 - Sexual reproduction
Page Number 126
Q. 1. How is the process of pollination different from fertilisation?
Answer:
Fertilisation and pollination are the two most important processes of plant reproduction. Pollination is the movement of pollen, whereas fertilisation is gamete fusion.
Pollination: Movement of the pollen grains from the male element (anther) to the female element (stigma) of a flower.
Fertilisation: Male and female gamete fusion, resulting in the formation of a zygote, which is a process after pollination.
Q. 2. What is the role of the seminal vesicles and the prostate gland?
Answer:
The prostate gland and seminal vesicles are significant in male reproduction due to their role in secreting fluids that support and carry sperm.
Seminal Vesicles: Secrete a sweet fluid that gives energy to sperm and aids in semen development.
Prostate Gland: Produces a fluid that assists in sperm protection and stimulation and adds to semen volume.
Q. 3. What are the changes seen in girls at the time of puberty?
Answer:
Puberty results in various physical and emotional modifications in women as they grow into adults.
Breast development and broader hips mark sexual maturity.
Menstruation occurs, marking the onset of reproductive ability.
Q. 4. How does the embryo get nourishment inside the mother’s body?
Answer:
The embryo is supported by the placenta, which links it to the mother's bloodstream.
The placenta enables the passage of nutrients and oxygen from the mother to the embryo and the evacuation of waste materials.
It sustains the growth of the embryo during pregnancy.
Q. 5. If a woman is using a copper-T, will it help in protecting her from sexually transmitted diseases?
Answer:
A copper-T is an intrauterine device (IUD) for contraception, but it does not offer protection against sexually transmitted diseases (STDs).
It works by making the environment not conducive to sperm, but does not close off infection.
Further protection, like condoms, is required to minimise the risk of STDs.
Access Answers to NCERT Solutions Class 10 Science Chapter 7 How do Organisms Reproduce (Chapter-End Exercise)
Here are the step-by-step solutions to all the chapter-end exercise questions, that help in revising the concepts thoroughly and easily.
Exercises Page no: 127
Q. 1. Asexual reproduction takes place through budding in
(a) amoeba.
(b) yeast.
(c) plasmodium.
(d) leishmania.
Answer:
Budding is a form of asexual reproduction where a new organism develops from a part of the parent.
The correct answer is Option (b) Yeast.
Q. 2. Which of the following is not a part of the female reproductive system in human beings?
(a) Ovary
(b) Uterus
(c) Vas deferens
(d) Fallopian tube
Answer:
Understanding the components of the female reproductive system is essential for biology.
The correct answer is Option (c) Vas deferens.
Q. 3. The anther contains
(a) sepals.
(b) ovules.
(c) pistil.
(d) pollen grains.
Answer:
The anther is an important part of the flower involved in reproduction.
The correct answer is Option (d) Pollen grains.
Q. 4. What are the advantages of sexual reproduction over asexual reproduction?
Answer:
Sexual reproduction has several advantages over asexual methods.
It provides increased genetic diversity and thus increased adaptability to varying environments.
It can produce healthier populations through the combination of genes and a lower chance of inherited diseases.
Q. 5. What are the functions performed by the testis in human beings?
Answer:
The testes have important functions in male reproductive health and function.
They produce sperm cells required for reproduction.
They secrete hormones, mainly testosterone, which control male characteristics and reproductive functions.
Q. 6. Why does menstruation occur?
Answer:
Menstruation is a natural phenomenon that occurs in women as part of the reproductive cycle.
It occurs when the uterine lining is shed if there is no fertilisation after ovulation.
The cycle readies the body for a possible pregnancy every month.
Q. 7. Draw a labelled diagram of the longitudinal section of a flower.
Answer:
A labelled diagram of a flower typically includes various parts such as petals, sepals, stamens, and pistils.
Labelled diagram of the longitudinal section of a flower 
Q. 8. What are the different methods of contraception?
Answer:
Methods of contraception prevent pregnancy and can be very diverse in method.
Barrier methods (such as condoms), hormonal methods (such as the pill), and intrauterine devices (IUDs) are a few examples.
Natural methods involve monitoring ovulation and avoiding sex during fertile times.
Q. 9. How are the modes of reproduction different in unicellular and multicellular organisms?
Answer:
Difference between mode of reproduction in a unicellular and a multicellular organism-
IN UNICELLULAR | IN MULTICELLULAR |
1. Asexual reproduction takes place in the unicellular organism. 2. Only one Parent is required to produce offspring. 3. No special cells and organs are present for reproduction. | 1. Sexual reproduction takes place in multicellular organisms. 2. A male and a female are both required in this method. 3. Special cells and organs are present for reproduction |
Q. 10. How does reproduction help in providing stability to populations of species?
Answer:
Reproduction is required to sustain healthy species populations over the long term.
It allows for population growth, which ensures species can survive environmental changes.
Reproduction also allows for genetic diversity, enhancing adaptability and resistance to disease.
Q. 11. What could be the reasons for adopting contraceptive methods?
Answer:
Individuals use contraceptive methods for different personal and health-related reasons.
To avoid unwanted pregnancies and control family size based on individual situations.
To control health problems or prevent pregnancy risks at some stages or conditions of life.
NCERT Solutions for Class 10 - Subject-wise Links
NCERT Solutions for Class 10 - All Subjects
NCERT Solutions for Class 10 Maths Chapterwise
Chapter-wise NCERT solutions for class 10 science
Topics and Subtopics of Class 10 Science Chapter 7
The chapter is divided into several important topics and subtopics so that the whole concept of reproduction in organisms can be understood completely. The most crucial topics are:
1. Introduction to Reproduction
Role of reproduction for the survival of a species
Distinctions between asexual and sexual reproduction
2. Asexual Reproduction
Binary Fission (Expressed in amoeba and bacteria)
Budding (Expressed in Hydra and yeast)
Vegetative Propagation (Expressed in plants such as potatoes and Bryophyllum)
Fragmentation & Spore Formation (Techniques employed by algae and fungi)
3. Sexual Reproduction
Description of gametes and fertilisation
Sexual reproduction in flowering plants (pollination, fertilisation, seed formation)
Reproductive system in humans (male and female reproductive organs)
4. Reproductive Health
Need for reproductive health
Contraceptive methods and population control
Approach to Solve NCERT Solutions for Class 10 Science Chapter 7 "How Do Organisms Reproduce?"
Begin with careful reading of the chapter to understand the fundamental concepts of reproduction, both asexual and sexual.
- Concentrate on important processes like binary fission, budding, vegetative propagation, fertilisation, and development of an embryo with the aid of diagrams and flowcharts.
- Note the structure and functions of the reproductive organs of plants and human beings, and understand the differences between different methods of reproduction.
- Practice responding to all in-text and exercise questions methodically, being clear in explanation and precise when labelling diagrams.
- Go through previous years' questions and refer to other resources if necessary to solidify understanding and improve exam preparedness.
Also, check the NCERT Books and NCERT Syllabus here:
Important Question of Chapter 7 How do Organisms Reproduce?
Question 1:
Explain the parts of the female reproductive system.
Answer:
The female reproductive system consists of a pair of ovaries, a duct system that consists of a pair of fallopian tubes, uterus, cervix, vagina.
1. Ovaries: The ovaries are the primary female sex organs. They produce ova and secrete the female sex hormones estrogen and progesterone, which are responsible for the development of secondary female sex characteristics and produce marked changes in the uterine endometrium.
2. Fallopian Tubes: These are parts of the female reproductive tract that receive the ovum, provide an appropriate environment for its fertilisation, and then transport it to the uterus. A fallopian tube is a muscular tube about 10 cm in length. A mature ovum is released each month from an ovary into one of the two Fallopian tubes leading to the uterus.
3. Uterus: The uterus or womb is a hollow, muscular cavity about 7–8 cm in length and 5 cm in width. The wall of the uterus has three layers.
4. Cervix: The lower part of the uterus is very narrow and is called the cervix. A part of the cervix projects into the upper part of the vagina.
5. Vagina: It is a muscular passage about 10 to 15 cm long that connects the uterus with the external world. It is composed of muscle and connective tissues, and the walls of the vagina are usually folded inward.
Download Ebook - NCERT Class 10 Science
CBSE NCERT Solutions for Class 10 Science - Chapter-wise
Below mentioned are the Chapterwise solutions:
Frequently Asked Questions (FAQs)
1. What is reproduction and why is it important for organisms?
Reproduction is the biological process by which organisms produce new individuals of the same kind. It is essential for the continuation of a species and the survival of life on Earth, ensuring genetic material is passed from one generation to the next.
2. What are the main types of reproduction in organisms?
There are two main types of reproduction:
Asexual reproduction, involving a single parent without the fusion of gametes, producing offspring genetically identical to the parent.
Sexual reproduction, involving two parents and the fusion of male and female gametes, resulting in genetically varied offspring
3. What is reproduction and why is it important for organisms?
Reproduction is the biological process organisms use to produce offspring. Reproduction is important for the continuation and survival of species. Reproduction serves to preserve genetic diversity, facilitate adaptation to new environments, and permit evolution by inheriting favorable characteristics from one generation to the next.
4. What are the advantages of sexual reproduction over asexual reproduction?
Sexual reproduction brings genetic variation, thus more adaptability to environmental shifts. It assists species in evolving by removing harmful mutations. Asexual reproduction creates offspring that are identical to one another, so they are more prone to diseases and environmental changes because of a lack of variation.
5. What is vegetative propagation? Explain with examples.
Vegetative propagation is a method of asexual reproduction where new plants develop from parts such as stems, roots, or leaves. Examples are Potato tubers, Onion bulbs, Bryophyllum leaves, and Sugarcane stem cuttings. It is of use in agriculture for the quick production of genetically similar plants.
6. How does reproduction occur in humans?
Sexual reproduction in humans takes place. Males secrete sperm in testes, and females secrete eggs in ovaries. Fertilization happens in the female's fallopian tube, producing a zygote, which then develops into an embryo. The embryo embeds in the uterus, where it develops into a fetus and gives birth.
7. What is the role of DNA in reproduction?
DNA conveys genetic information from parents to offspring. DNA ensures the traits are passed down while providing scope for variations due to mutations. DNA replicates during cell division to preserve genetic continuity. DNA regulates the function, growth, and development of an organism through its life.
8. Why is variation important in reproduction?
Variation aids in adapting species to environmental modifications, enhancing survival probabilities. Variation contributes significantly to evolution through the mechanism of natural selection, where the advantageous characteristics are favored. In sexually reproducing species, variation causes genetic variability, lowering disease and environmental risk susceptibility.
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Since you are a domicile of Karnataka and have studied under the Karnataka State Board for 11th and 12th , you are eligible for Karnataka State Quota for admission to various colleges in the state.
1. KCET (Karnataka Common Entrance Test): You must appear for the KCET exam, which is required for admission to undergraduate professional courses like engineering, medical, and other streams. Your exam score and rank will determine your eligibility for counseling.
2. Minority Income under 5 Lakh : If you are from a minority community and your family's income is below 5 lakh, you may be eligible for fee concessions or other benefits depending on the specific institution. Some colleges offer reservations or other advantages for students in this category.
3. Counseling and Seat Allocation:
After the KCET exam, you will need to participate in online counseling.
You need to select your preferred colleges and courses.
Seat allocation will be based on your rank , the availability of seats in your chosen colleges and your preferences.
4. Required Documents :
Domicile Certificate (proof that you are a resident of Karnataka).
Income Certificate (for minority category benefits).
Marksheets (11th and 12th from the Karnataka State Board).
KCET Admit Card and Scorecard.
This process will allow you to secure a seat based on your KCET performance and your category .
check link for more details
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Hope this helps you .
Mitali Sharma 30 January,2025
Hello Aspirant, Hope your doing great, your question was incomplete and regarding what exam your asking.
SWETCHCHA MISKA 10 July,2024
Yes, scoring above 80% in ICSE Class 10 exams typically meets the requirements to get into the Commerce stream in Class 11th under the CBSE board . Admission criteria can vary between schools, so it is advisable to check the specific requirements of the intended CBSE school. Generally, a good academic record with a score above 80% in ICSE 10th result is considered strong for such transitions.
Manasvini Gupta 23 July,2024
hello Zaid,
Yes, you can apply for 12th grade as a private candidate .You will need to follow the registration process and fulfill the eligibility criteria set by CBSE for private candidates.If you haven't given the 11th grade exam ,you would be able to appear for the 12th exam directly without having passed 11th grade. you will need to give certain tests in the school you are getting addmission to prove your eligibilty.
best of luck!
Ashvadha 03 July,2024
According to cbse norms candidates who have completed class 10th, class 11th, have a gap year or have failed class 12th can appear for admission in 12th class.for admission in cbse board you need to clear your 11th class first and you must have studied from CBSE board or any other recognized and equivalent board/school.
You are not eligible for cbse board but you can still do 12th from nios which allow candidates to take admission in 12th class as a private student without completing 11th.
sadafreen356 03 July,2024
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