Statement I: Branchiostoma and Balanoglossus are bilaterally symmetrical and triploblastic animals. Statement II: They are exclusively marine and possess notochord.

Question

Statement I: Branchiostoma and Balanoglossus are bilaterally symmetrical and triploblastic animals. Statement II: They are exclusively marine and possess notochord. (A) Both statements I and II are correct and II explains I (B) Both statements I and II are correct and II does not explain I (C) Statement I is true and statement II is false (D) Both statements I and II are false

Tardigrade Admin · Accepted Answer

Balanoglossus(Phylum-Hemichordata) and Branchiostcma (= 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.

Q. Statement I: Branchiostoma and Balanoglossus are bilaterally symmetrical and triploblastic animals. Statement II: They are exclusively marine and possess notochord.

Both statements I and II are correct and II explains I

Both statements I and II are correct and II does not explain I

Statement I is true and statement II is false

Both statements I and II are false

Q. Statement I: Branchiostoma and Balanoglossus are bilaterally symmetrical and triploblastic animals.
Statement II: They are exclusively marine and possess notochord.