MCQ
Which of the following statements is correct?
- AParthenium is an endemic species of our country.
- BAfrican catfish is not a threat to indigenous catfishes.
- CSteller’s sea cow is an extinct animal.
- DLantana is popularly known as carrot grass.
Explanation:
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Reason : Presence of insert results in inactivation of enzyme $\beta -$ galactosidase known as insertional inactivation.