NCERT Solutions for Class 10 Science Chapter 7 How Do Organisms Reproduce, Download in PDF

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Here you will get the NCERT Solutions for CBSE Class 10 Science Chapter 7, How Do Organisms Reproduce. All the solutions have been revised by subject experts to provide an error free study material to our students. All the class 10 Science NCERT solutions have been collated in PDF format which students may easily download free of cost. 

Check NCERT Solutions for CBSE Class 10 Science Chapter How Do Organisms Reproduce below: 

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

Solution: The creation of DNA copy is essential in order to produce organisms which are similar to their parents in their genetic set up. DNA contains the information necessary for the inheritance of features. DNA copying also produces variations which increases the chances of survival of the organism.

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

Solution: Niches are basically well defined places in an ecosystem where a population of different or same organisms live and reproduce. The population of a particular niche is well adapted to the environment of that niche. However, this population may get wiped out due to certain ecological changes like drastic temperature change. But, if some variations are present in some individuals of that population then there will still be some chances of their survival. The surviving individual can further reproduce and develop a population as per the changed niche. Thus, variation is beneficial to a species but not necessarily for the individual.

Question 3: How does binary fission differ from multiplefission?

Solutions:

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

Solution: Spores have an outer hard protective covering called cyst which can withstand adverse conditions like high temperature, acidity, alkalinity and shortage of food and water. Reproduction through spores ensures that the organism can survive these adverse conditions and will not die. On the onset of favourable conditions, the cyst breaks and releases the daughter cells each forming a new organism. Spores can remain dormant till the favourable conditions become available. Spores also help in extending the niche of the organism as they are dispersed through water, air and other agencies.

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

Solution: In complex multicellular organisms, specialized cells make up tissues; tissues make up organs; organs make up organ systems; and finally organ systems make up organisms. These organisms have a very high degree of organization and thus cannot be reproduced from their cut body parts by the process of regeneration.

Get the complete NCERT solutions for Class 10: How Do Organisms Reproduce, from the following link:

Before solving the questions given in the Class 10 Science NCERT chapter- How Do Organisms Reproduce, students should thoroughly read this chapter to grasp all the concepts explained in it. This will help you understand the problem discussed in a question and then come up with an appropriate answer.

Main topics discussed in Class 10 Science chapter: How Do Organisms Reproduce are:

• Importance of variation among organisms
• Modes of reproduction used by organisms

                Fission

                Fragmentation

                Regeneration

                Budding

                Vegetative propagation

                Spore formation

                Sexual reproduction

• Importance of sexual mode of reproduction
• Sexual reproduction in flowering plants
• Reproduction in human beings
• Male reproductive system
• Female reproductive system
• What happens when the egg is not fertilised?
• Reproductive health

Find below the link to download the complete Chapter:

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