PDF chapter test TRY NOW
Fill in the blanks:
skeleton | two | thorax |
invertebrate | swan | body |
cockroach | breast | breastbone |
pneumatic | streamlined | forelimbs |
feathers | hind | snail |
1. The body of cockroach is covered with a hard.
2. Themuscles are responsible for flight.
3. The bones of the birds are known asbones.
4. The wings of the birds are equipped withthat play a role in flight.
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