NCERT Solutions for Class 10 Science Chapter 7 How do Organisms Reproduce

The chapter “How do Organisms Reproduce” is an important topic in Class 10 Science as it helps students understand one of the most basic processes of life – reproduction. To support students in preparing for their exams, NCERT Solutions for Class 10 Science Chapter 7 provide clear and detailed explanations to all the textbook exercises. These solutions are designed in simple language so that students can easily grasp the concepts and learn how reproduction takes place in different organisms.

The how do organisms reproduce class 10 solutions include answers to both short and long questions, covering every concept given in the NCERT textbook. The solutions not only explain the theory but also guide students in writing accurate and exam-ready answers. Since this chapter includes topics like asexual reproduction, sexual reproduction, reproductive health, and variations in reproduction, students often need step-by-step explanations. With these class 10 science chapter 7 question answer sets, learners can practice effectively and improve their understanding.

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The chapter is often considered scoring because the class 10 science how do organisms reproduce questions answers are straightforward when prepared well. By practicing these class 10 science ch 7 how do organisms reproduce question answer, students can become confident in writing proper definitions, diagrams, and explanations in exams. These answers are framed according to CBSE guidelines, which helps in building a strong foundation for higher studies as well.

Whether students look for class 10 science ch how do organisms reproduce question answer or the complete class 10 science chapter how do organisms reproduce question answer, they will find these NCERT solutions extremely useful. The how do organisms reproduce question answer section simplifies complex ideas and connects them with real-life examples, making learning engaging and meaningful.

Do Check: NCERT Solutions for Class 10 Science Chapter 6

Class 10 Science Chapter 7 Question Answers

Q1. What is the Importance of DNA Copying in Reproduction?

Answer:

• DNA contains the information needed for cell division and passing features from one generation to the next.
• Before a cell divides, its DNA is copied so that each new cell gets the same set of instructions.
• This copying is necessary for processes like mitosis (growth and repair) and meiosis (formation of gametes).
• Without DNA replication, new organisms cannot be formed.

Q2. Why is Variation Beneficial to the Species but Not Always for the Individual?

Answer:

• Variations may sometimes harm individuals, but they are useful for the species in the long run.
• Example: If climate changes suddenly, most organisms may die. But those with helpful variations (like heat resistance in bacteria) will survive.
• This survival ensures the continuation of the species even in changing environments.

Q3. What is the Difference Between Binary Fission and Multiple Fission?

Q4. What are the Benefits of Reproduction Through Spores?

Answer:

• Spores are very light and can travel far with wind, avoiding overcrowding.
• They are produced in large numbers, increasing chances of survival.
• A thick protective covering allows them to survive harsh conditions and grow later when conditions are favorable.

Do Check: NCERT Solutions for Class 10 Science

Q5. Why Complex Organisms Cannot Reproduce by Regeneration?

Answer:

• Regeneration works with simple organisms that have less specialized cells.
• Complex organisms have specialized organs and tissues, so they cannot form whole individuals from small parts.
• Hence, they rely on sexual or vegetative reproduction instead.

Q6. What is the Importance of Vegetative Propagation?

Answer:

• It is a quick, easy, and cost-effective method.
• Helps in producing plants of better quality and variety.
• Useful for plants that do not produce seeds or where seeds fail to grow.
• Helps in spreading plants to new areas.

Q7. What is the Pollination vs Fertilization?

Q8. What is the Role of Seminal Vesicles and Prostate Gland?

Answer:

• They produce fluid that nourishes sperm.
• Help in transporting sperms smoothly.
• Provide energy for sperm movement.

Do Check: NCERT Solutions for Class 10

Q9. What are the Changes in Girls During Puberty?

Answer:

• Growth of breasts and darkening of nipples.
• Hair growth in genital areas, underarms, arms, and legs.
• Uterus and ovaries enlarge.
• Menstrual cycle begins.
• Skin may become oily and pimples appear.

Q10. What is the Nourishment of Embryo Inside Mother’s Body?

Answer:

• The embryo receives food and oxygen from the mother through the placenta.
• Placenta is attached to the uterus wall and connects mother’s blood with embryo’s villi.
• It allows nutrients and oxygen to pass from mother to baby and removes waste.

Q11. Does Copper-T Protect Against STDs?

Answer:

• No. Copper-T prevents pregnancy but does not stop sexually transmitted diseases.
• Only barrier methods like condoms can reduce the risk of STDs.

Q12. What is the Asexual Reproduction Through Budding?

Answer:

• Takes place in yeast.
• A small bud grows on the parent’s body, then detaches to form a new organism.

Q13. Which is Not Part of Female Reproductive System?

Answer:

• Vas deferens (belongs to the male reproductive system).
• Female reproductive system includes ovary, uterus, and fallopian tubes.

Do Check: CBSE Class 10 Science Syllabus

Q14. What are the Advantages of Sexual Reproduction Over Asexual?

Answer:

• Produces genetic variations.
• Helps in evolution and origin of new species.
• Increases survival chances in changing environments.

Q15. Why Does Menstruation Occur?

Answer:

• If the egg is not fertilized, the thickened lining of the uterus breaks down.
• This comes out through the vagina as blood and tissue once a month.

Q16. What is the Methods of Contraception?

• Natural method: Avoid intercourse during fertile days.
• Barrier method: Condoms, diaphragms, copper-T.
• Chemical method: Pills, creams, spermicides.
• Surgical method: Vasectomy (male), tubectomy (female).
• Hormonal method: Oral pills and injections.

Q17. How Does Reproduction Provide Stability to a Species?

Answer:

• Ensures new individuals replace old ones.
• Maintains population balance.
• Variations introduced during reproduction help in survival and evolution.

Do Check: CBSE Class 10 Science Notes

Q18. What is the Difference in Reproduction – Unicellular vs Multicellular?

Q19. What are the Reasons for Adopting Contraception?

Answer:

• Family planning and spacing between children.
• Protecting mother’s health.
• Financial and social reasons.
• To prevent overpopulation.
• Condoms also reduce risk of sexually transmitted infections (STIs).