Animal Kingdom Question 574
Question: Assertion : Asterias has a small intestine. Reason : Asterias takes predigested food material from the host body.
Options:
A) If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B) If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C) If the assertion is true but the reason is false
D) If both the assertion and reason are false
Show Answer
Answer:
Correct Answer: C
Solution:
Digested food in Asterias is absorbed mainly by pyloric caeca and distributed to various parts of the body by coelomic fluid.
Excess food is stored in the storage cells of the pyloric caeca.
As the absorption of food is more or less completed in pyloric caeca, it does not require a long intestine.
Hence, the intestine is very short.
As the animal ingests partially digested food, it has little undigested material, which is eliminated through the mouth itself.
Little egestion takes place through the anus.
Thus intestine, hardly has any necessity of this purpose.
BETA
