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Assertion (A): Organisms belonging to cn...

Assertion (A): Organisms belonging to cnidaria do not possess coelom.
Reason (R): Cnidarians are diploblastic animals.

A

Both A and R are true and R is the correct explanation for A.

B

Both A and R are true but R is not the correct explanation for A.

C

A is true and R is false.

D

A is false and R is true.

Text Solution

AI Generated Solution

### Step-by-Step Solution: 1. **Understanding the Assertion**: The assertion states that organisms belonging to the phylum Cnidaria do not possess a coelom. A coelom is a fluid-filled body cavity that is completely lined by mesoderm. 2. **Analyzing Cnidarians**: Cnidarians, which include jellyfish, corals, and sea anemones, are indeed known to lack a true coelom. Instead, they have a simple body structure consisting of two layers of cells: the outer ectoderm and the inner endoderm, with a gelatinous substance called mesoglea in between. 3. **Understanding the Reason**: The reason provided states that Cnidarians are diploblastic animals. Diploblastic organisms have two germ layers (ectoderm and endoderm) and do not develop a mesoderm layer, which is essential for the formation of a coelom. ...
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Knowledge Check

  • Animal cells do not possess

    A
    Plasmodesmata
    B
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    C
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    D
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    B
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    D
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    A
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    B
    Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
    C
    Assertion (A) is true but reason (R) is false.
    D
    Assertion (A) is false but reason (R) is true.

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