NEET UG BIOLOGY MCQ: ANIMAL KINGDOM

1 Easy

1 of 1

Understanding +4 | -1

Assertion (A) In many gastropods, the anus and the mantle
cavity are placed anteriorly above the head.
Reason (R) 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^ \circ }

in many gastropods.

View answer and explanation

Correct option: A

If both A and R are true and R is the correct explanation
of A

Option A is correct because both the assertion and reason are true, and the reason (torsion) explains why the anus and mantle cavity are located anteriorly in many gastropods.

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