The mass extinctions that occurred 250 million years ago and 65 million years ago may have been due to gradual process or Catastrophic events.
Answer:
1. True
2. True
3. True
4. False
5. False
6. True
7. False
8. False
-COOH
Explanation:
-OH is hydroxyl
-CH3 is methyl
-C=O is carbonyl
Hunting in groups, keen eyesight, chemicals to paralyze prey
