Q. With reference to hybodont shark, consider the following statements:
1. It was a dominant group of fishes found in both marine and fluvial environments.
2. It became extinct at the end of the Cretaceous period.
Which of the statements given above is/are correct?
Answer: C
Notes:
Both statements are correct.
- Hybodonts, an extinct group of sharks, was a dominant group of fishes in both marine and fluvial environments during the Triassic and early Jurassic time. However, hybodont sharks started to decline in marine environments from the Middle Jurassic onwards until they formed a relatively minor component of open-marine shark assemblages. Hybodonts finally became extinct at the end of the Cretaceous time 65 million years ago.
Source: PIB
