NEETBotanyAnimal Kingdom
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Branchiostoma possesses a closed circulatory system whereas Ascidia has an open circulatory system. Reason (R): Cephalochordates have a closed circulatory system while Urochordates have an open circulatory system. In the light of the above statements, choose the most appropriate answer from the opt
Options
- ABoth (A) and (R) are true and (R) is the correct explanation of (A)
- BBoth (A) and (R) are true but (R) is not the correct explanation of (A)
- C(A) is true but (R) is false
- D(A) is false but (R) is true
Correct answer
A. Both (A) and (R) are true and (R) is the correct explanation of (A)
Step-by-step solution
Assertion (A) is true because Branchiostoma is a cephalochordate which has a closed circulatory system, whereas Ascidia is a urochordate which has an open circulatory system. Reason (R) is also true and correctly explains the assertion by stating the general characteristics of the respective subphyla to which these animals belong. While chordates generally have a closed circulatory system, urochordates are a notable exception and possess an open circulatory system. Answer: Both (A) and (R) are true and (R) is the c