Assertion – Daphnia populations in a water body at different seasons of an year showed marked variations in their body morphology
Reason – Cyclomorphosis in some planktonic organisms is influenced by the variations in temperatures prevailing in their water bodies at different seasons

Both Assertion and Reason are true and Reason is the correct explanation of Assertion

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Both Assertion and Reason are true but Reason is not the correct explanation of Assertion

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Assertion is true but Reason is false

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Assertion is false but Reason is true

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Solution

The correct option is A Both Assertion and Reason are true and Reason is the correct explanation of Assertion
Daphnia, a genus of small planktonic crustaceans. Cyclomorphosis is the occurrence of seasonal changes in the phenotype of an organism through successive generations. It occurs in small aquatic invertebrates like Daphnia. Here cyclomorphosis is influenced by the variations in temperature prevailing in the water bodies at different seasons.

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Q. Assertion – Daphnia populations in a water body at different seasons of an year showed marked variations in their body morphology
Reason – Cyclomorphosis in some planktonic organisms is influenced by the variations in temperatures prevailing in their water bodies at different seasons

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Question 7
Rainfall patterns depend on:

(a) the underground water table
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Q. Question 7
Rainfall patterns depend on

(a) the underground water table
(b) the number of water bodies in an area
(c) the density pattern of human population in an area
(d) the prevailing season in an area

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Assertion – Daphnia populations in a water body at different seasons of an year showed marked variations in their body morphology Reason – Cyclomorphosis in some planktonic organisms is influenced by the variations in temperatures prevailing in their water bodies at different seasons

Assertion – Daphnia populations in a water body at different seasons of an year showed marked variations in their body morphology
Reason – Cyclomorphosis in some planktonic organisms is influenced by the variations in temperatures prevailing in their water bodies at different seasons