AIIMS 2015
- Exam
- AIIMS
- Year
- 2015
- Subject
- Botany
- Chapter
- Animal Kingdom
AIIMS 2015 · Botany · Animal Kingdom
Assertion : Branchiostoma and Balanoglossus are bilaterally...
Assertion : Branchiostoma and Balanoglossus are bilaterally symmetrical and triploblastic animals.
Reason : They are exclusively marine and possess notochord.
Options
- AIf both assertion and reason are true and reason is the correct explanation of assertion.
- BIfboth assertion and reason are true but reason is not the correct explanation of assertion.
- CIf assertion is true but reason is false.
- DIf both assertion and reason are false.
Correct answer
C. If assertion is true but reason is false.
Step-by-step solution
Balanoglossus (Phylum-Hemichordata) and Branchiostoma (= Amphioxus, Subphylum - Cephalochordata) both are bilaterally symmetrical and triploblastic animals. Both are marine animals. Balanoglossus does not possess a notochord whereas Branchiostoma being a chordate possesses notochord that persists throughout life.