Animal Kingdom Question 760
Question: Assertion : Amphioxus has a simple organization compared to vertebrates. Reason : Many important craniate structures are lacking in Amphioxus.
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: A
Solution:
Amphioxus is devoid of heart, head, kidneys and paired limbs.
Paired sense organs are absent here receptors are of primitive types.
A complete notochord is persistant with no vertebral column.
These show that it is has a simple organization compared to vertebrates because many important craniate structures are lacking in it.
But it is definitely a simple chordate having a large number of primitive characters such as a notochord, dorsal hollow nerve cord, and gill clefts.
BETA
