8. How do Organisms Reproduce-Introduction Science Class 10 In English-CBSE Notes
Last Updated : 14 March 2026
Explore science cbse notes for Class 10 Chapter 8. How do Organisms Reproduce Topic Introduction in English medium for exams preparation.
8. How do Organisms Reproduce-Introduction Science Class 10 In English-CBSE Notes
Last Updated : 14 March 2026
8. How do Organisms Reproduce-Introduction Science Class 10 In English-CBSE Notes
8. How do Organisms Reproduce
Introduction
Chapter 8. How do Organisms Reproduce?
Reproduction: Reproduction is the process by which living organisms produce new individuals similar to themselves to ensures continuity of life on earth.
Importance of D.N.A Copying in Reproduction:
A basic event in reproduction is the creation of a DNA copy. Cells use chemical reactions to build copies of their DNA. This creates two copies of the DNA in a reproducing cell, and they will need to be separated from each other. The following importances of D.N.A copying are as in reproduction:
(i) The consistency of DNA copying during reproduction is important for the maintenance of body design features that allow the organism to use that particular niche.
(ii) Organisms look similar because their body designs are similar. If body designs are to be similar, the blueprints for these designs should be similar.
(iii) There come variations in the copy of D.N.A that couse ability for organisms to survive in unlike conditions.
(iv) The DNA in the cell nucleus is the information source for making proteins. If the information is changed, different proteins will be made. Different proteins will eventually lead to altered body designs.
The Cause of variations in Body Design:
In the reproductive cells organisms prepare blueprints of reproductive body designs to be similar body designs. But there comes some changes or variations in body designs due to some errors. As the chromosomes in the nucleus of a cell contain information for inheritance of features from parents to next generation in the form of DNA (Deoxyribo Nucleic Acid) molecules. The DNA in the cell nucleus is the information source for making proteins. If the information is changed, different proteins will be made. Different proteins will eventually lead to altered body designs. These errors are main cause of variations in organisms during the protien synthesis.
How do variations comes in organisms?
There form two copies of D.N.A in the reproductive cells during the reproductions as well as others cellular structures generate and when these copies detach to each other then one cell divides itself to form to newer cells. Hence In the nucleus of cell D.N.A have the difference informations for the protien synthesis so this causes variations in reproductive cells. As DNA copying mechanisms cannot be absolutely accurate and resultant errors taken place. These errors are a source of varitions in populations of organisms.
The Importance of Variations in Organisms:
(i) Variations cause difference features in organisms that allow their species to take habbitates in ecosystems or use particular niche.
(ii) Variations are also useful for species to survive in the environment.
(iii)
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NCERT Solutions for Class 10 science Chapter 8. How do Organisms Reproduce Topic Introduction
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8. How do Organisms Reproduce-Introduction Science Class 10 In English-CBSE Notes
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