MCQ
All birds have:
- ✓Internal fertilization, are oviparous and eggs are covered with calcareous shell.
- BNests to care their babies.
- CFeather on their body and can fly.
- DOil gland at the base of tail.
✓
Answer
Correct option: A.
Internal fertilization, are oviparous and eggs are covered with calcareous shell.
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