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Assertion: All triploblastic eucoelomate...

Assertion: All triploblastic eucoelomates.
Reason: They have a false coelom.

A

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

B

If both A and R are true, but R is not the correct explanation of A

C

If A is true but R is false

D

If both A and Rare false

Text Solution

AI Generated Solution

The correct Answer is:
To solve the assertion and reason question, we need to analyze both the assertion and the reason carefully. ### Step-by-Step Solution: 1. **Understanding the Assertion**: - The assertion states: "All triploblastic eucoelomates." - Triploblastic organisms are those that have three germ layers: ectoderm, mesoderm, and endoderm. However, not all triploblastic organisms are eucoelomates (which have a true coelom). For example, members of the phylum Platyhelminthes (flatworms) are triploblastic but are classified as acoelomates (they lack a coelom). 2. **Understanding the Reason**: - The reason states: "They have a false coelom." - A false coelom (or pseudocoelom) is a body cavity that is not completely lined by mesoderm. However, eucoelomates have a true coelom that is fully lined by mesoderm. Therefore, the statement in the reason is incorrect as it misrepresents the characteristics of eucoelomates. 3. **Evaluating the Assertion and Reason**: - Since the assertion is incorrect (not all triploblastic organisms are eucoelomates) and the reason is also incorrect (eucoelomates do not have a false coelom), we conclude that both statements are false. 4. **Conclusion**: - The correct answer is that both the assertion and the reason are false. ### Final Answer: Both the assertion and the reason are false. ---
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