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Science · 2023 · 5 marks
CBSE 2023 · Region 6 · Set 2 · Q36
Give reason for the following: (a) During reproduction inheritance of different proteins will lead to altered body designs. (b) Fertilization cannot…
Give reason for the following :
(a)
During reproduction inheritance of different proteins will lead to altered body designs.
(b)
Fertilization cannot take place in flowers if pollination does not occur.
(c)
All multicellular organisms cannot give rise to new individuals through fragmentation or regeneration.
(d)
Vegetative propagation is practised for growing only some type of plants.
(e)
The parents and off-springs of organisms reproducing sexually have the same number of chromosomes. Q. No. $\displaystyle 37$ to $\displaystyle 39$ are case based / data based questions with $\displaystyle 2$ to $\displaystyle 3$ short sub-parts. Internal choice is provided in one of these sub-parts.
Marking-scheme solution
(a) As DNA is the information source for making proteins. If the information is changed, different protein will be made and will lead to altered body design.
(b) In the absence of pollination no male gametes will be available for fertilisation.
(c) Because in many multi cellular organisms specialised cells are organised into tissues, tissues form organ occupying definite positions in the body.
(d) 1. Plants can bear flowers and fruits earlier than those produced from seeds.
2. It enables the propagation of plants such as banana, orange, rose and jasmine which have lost the capacity to produce seeds.
3. The plants produced are genetically similar enough to the parent plant to have all the characteristics
All How do Organisms Reproduce? questions2023 question paperNCERT solutions: How do Organisms Reproduce?Practice How do Organisms Reproduce? →
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CBSE Class 10 Science past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.