Class 10 NCERT Solutions How do Organisms Reproduce

Class 10 NCERT Solutions How do Organisms Reproduce with answers available in Pdf for free download. The NCERT Solutions for Class 10 Science with answers have been prepared as per the latest syllabus, NCERT books and examination pattern suggested in Standard 10 by CBSE, NCERT and KVS. Solutions to questions given in NCERT book for Class 10 Science are an important part of exams for Grade 10 Science and if practiced properly can help you to get higher marks. Refer to more Chapter-wise Solutions for NCERT Class 10 Science and also download more latest study material for all subjects

How do Organisms Reproduce Class 10 NCERT Solutions

Class 10 Science students should refer to the following NCERT questions with answers for How do Organisms Reproduce in standard 10. These NCERT Solutions with answers for Grade 10 Science will come in exams and help you to score good marks

How do Organisms Reproduce NCERT Solutions Class 10

Class 10 NCERT Solutions How do Organisms Reproduce- NCERT Solutions prepared for CBSE students by the best teachers in Delhi.

Class X Chapter 8 – How do Organisms Reproduce Science

Question 1: What is the importance of DNA copying in reproduction?

Answer: DNA (Deoxyribonucleic acid) is the genetic material found in the chromosomes, which are present in the nucleus of a cell. The DNA is the information site for making proteinsand each specific type of protein leads to a specific type of body design. Thus, it is the DNA molecule that determines the body design of an individual. Therefore, it can be concluded that it is the DNA that gets transferred from parents to offsprings and makes them look similar. DNA determines body structure

Question 2: Why is variation beneficial to the species but not necessarily for the individual?

Answer: Variations are beneficial to the species than individual because sometimes for a species, the environmental conditions change so drastically that their survival becomes difficult. For example, if the temperature of water increases suddenly, then most of the bacteria living in that water would die. Only few variants that are resistant to heat would be able to survive. However, if these variants were not there, then the entire species of bacteria  would have been destroyed. Thus, these variants help in the survival of the species.However, all variations are not necessarily beneficial for the individual organisms.

Class X Chapter 8 – How do Organisms Reproduce Science

Question 1: How does binary fission differ from multiple fission?

Answer: In binary fission, a single cell divides into two equal halves. Amoeba and Bacteria divide by binary fission. Binary fission in Amoeba

In multiple fission, a single cell divides into many daughter cells simultaneously. Amoeba and Plasmodium divide by multiple fission. Multiple fission in Plasmodium

Question 2: How will an organism be benefited if it reproduces through spores?

Answer: There are many advantages, if an organism reproduces through spores. Advantages of spore formation:

· Large numbers of spores are produced in one sporangium.

· Spores are distributed easily by air to far-off places to avoid competition at one place.

· Spores are covered by thick walls to prevent dehydration under unfavourable conditions.

Question 3: Can you think of reasons why more complex organisms cannot give rise to new individuals through regeneration?

Answer:Simple organisms such as Hydra and Planaria are capable of producing new individuals through the process of regeneration. The process of regeneration involves the formation of new organisms from its body parts. Simple organisms can utilize this method of reproduction as their entire body is made of similar kind of cells in which any part of their body can be formed by growth and development. However, complex organisms have organ-system level of organization. All the organsystems of their body work together as an interconnected unit. They can regenerate their lost body parts such as skin, muscles, blood, etc. However, they cannot give rise to new individuals through regeneration.

Question 4: Which of the following is a plant hormone?

  (a) Insulin

  (b) Thyroxin

 (c) Oestrogen

 (d) Cytokinin

Answer: (d) Cytokinin is a plant hormone.

Question 5: Why is DNA copying an essential part of the process of reproduction?

Answer: DNA (Deoxyribonucleic acid) copying is an essential part of reproduction as it passes genetic information from parents to offspring. It determines the body design of an individual. The reproducing cells produce a copy of their DNA through some chemical reactions and result in two copies of DNA. The copying of DNA always takes place along with the creation of additional cellular structure. This process is then followed by division of a cell to form two cells.

Class X Chapter 8 – How do Organisms Reproduce Science

Question 1: How is the process of pollination different from fertilization?

Answer: Pollination is the process of transfer of pollens from anther to stigma. It occurs with the help of certain pollinators such as air, water, birds, or some insects. Fertilization, on the other hand, is the fusion of the male and female gametes. It occurs inside the ovule and leads to the formation of zygote.

Question 2: What is the role of the seminal vesicles and the prostate gland?

Answer: The secretions from seminal vesicles and prostate glands lubricate the sperms and provide a fluid medium for easy transport of sperms. Their secretion also provides nutrient in the form of fructose, calcium, and some enzymes.

Question 3: What are the changes seen in girls at the time of puberty?

Answer:Secondary sexual characteristics in girls:

· Increase in breast size and darkening of skin of the nipples present at the tips of the breasts.

· Appearance of hair in the genital area.

· Appearance of hair in other areas of skin like underarms, face, hands, and legs.

· Increase in the size of uterus and ovary.

· Beginning of menstrual cycle.

· More secretion of oil from the skin, which results in the appearance of pimples.

Question 4: How does the embryo get nourishment inside the mother’s body?

Answer: The embryo develops inside the mother’s body for about nine months. Inside the uterus, the outer tissue surrounding the embryo develops finger-like projections called villi. These villi are surrounded by uterine tissue and maternal blood. They provide a large surface area for exchange of oxygen and nutrients. Also, there is a special tissue calledplacenta, which is embedded in the uterine wall. The embryo receives the oxygen and nutrients from the mother’s blood via the placenta. The waste materials produced by the embryo are also removed through the placenta.

Question 5: If a woman is using a copper−T, will it help in protecting her from sexually transmitted diseases?

Answer: No. Using a copper-T will not provide a protection from sexually transmitted diseases, as it does not prevent the entry of semen. It only prevents the implantation of the embryo in the uterus.

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Chapter 1 Chemical Reactions and Equations
Class 10 NCERT Solutions Chemical Reactions and Equations
Chapter 2 Acids, Bases and Salt
Class 10 NCERT Solutions Acids Bases and Salts
Chapter 3 Metals and Nonmetals
Class 10 NCERT Solutions Metals and Non-metals
Chapter 4 Carbon and Its Compounds
Class 10 NCERT Solutions Carbon and its Compounds
Chapter 5 Periodic Classification of Elements
Class 10 NCERT Solutions Periodic Classification of Elements
Chapter 6 Life Processes
Class 10 NCERT Solutions Life Processes
Chapter 7 Control and Coordination
Class 10 NCERT Solutions Control and Coordination
Chapter 8 How do Organisms Reproduce?
Class 10 NCERT Solutions How do Organisms Reproduce
Chapter 9 Heredity and Evolution
Class 10 NCERT Solutions Heredity and Evolution
Chapter 10 Light Reflection and Refraction
Class 10 NCERT Solutions Light-Reflection and Refraction
Chapter 11 The Human Eye and Colourful World
Class 10 NCERT Solutions Human Eye and Colourful World
Chapter 12 Electricity
Class 10 NCERT Solutions Electricity
Chapter 13 Magnetic Effects of Electric Current
Class 10 NCERT Solutions Magnetic Effects of Electric current
Chapter 14 Sources of Energy
Class 10 NCERT Solutions Sources of Energy
Chapter 15 Our Environment
Class 10 NCERT Solutions Our Environment
Chapter 16 Sustainable Management of Natural Resources
Class 10 NCERT Solutions Management of Natural Resources

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