Animal Kingdom Question 724
Assertion : Amphioxus is a fish. Reason : Amphioxus has a dorsal fin but no ventral or caudal fin.
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 the assertion is false but reason is true
Show Answer
Answer:
Correct Answer: D
Solution:
Amphioxus, though aquatic in nature, belong to cephalochordata (lower chordate).
As it lives in water, it has some structural similarities with aquatic animals.
These are - (i) Body is slender, laterally compressed, and pointed at both ends.
(ii) Along the middorsal side, there is a dorsal fin, at the tail region, there is a caudal fin, mid ventrally, there is a ventral fin.
(iii) The dorsal fin is supported by dermal bones.
But it is important to note that the fins do not have the same structure as the fins of fishes.
BETA
