BIO · BIO-2026-C11-147जीव विज्ञान (Biology)
A group of researchers procured some fish like animals and upon investigation the following characters were observed: A. Endoskeleton was made of cartilage. B. Ectoparasitic; as they were found attached on fish skin with their circular sucking mouth. C. Paired fins and scales were absent, but 7 pairs of gill slits were present. Which of the following species of animals did they consider to fit best with these characters?
- AScoliodon sp.
- BPetromyzon sp.
- CExocoetus sp.
- DBranchiostoma sp.
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