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In the following questions, the statement of Assertion is foll
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In the following questions, the statement of Assertion is followed by a statement of Reason. Choose the correct option for them :
Assertion: In many gastropods, the arms and the mental cavity are placed anteriorly above the head.
Reason: During embryonic development in many gastropods, one side of the visceral mass grows faster than the other side. This uneven growth rotates the visceral organs up to 180° in many gastropods.

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

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

C
Assertion is true, but Reason is false

D
Assertion is false, but Reason is true

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In the following questions, the statement of Assertion is followed by a statement of Reason. Choose the correct option for them :
Assertion: In many gastropods, the arms and the mental cavity are placed anteriorly above the head.
Reason: During embryonic development in many gastropods, one side of the visceral mass grows faster than the other side. This uneven growth rotates the visceral organs up to 180° in many gastropods.
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Text SolutionText solutionverified iconVerified

In gastropods the skin of visceral mass forms a thin delicate covering called mantle over the head. The hindgut of alimentary canal is composed of rectum andanus. The anus is located at anterior end. During development in most gastropods due to torsion the visceral mass and the shell embryo become spirally coiled (due to unequal growth).
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Question Text
In the following questions, the statement of Assertion is followed by a statement of Reason. Choose the correct option for them :
Assertion: In many gastropods, the arms and the mental cavity are placed anteriorly above the head.
Reason: During embryonic development in many gastropods, one side of the visceral mass grows faster than the other side. This uneven growth rotates the visceral organs up to 180° in many gastropods.
TopicAnimal Kingdom
SubjectBiology
ClassClass 11
Answer TypeText solution:1
Upvotes93