Sam went to science laboratory to see the specimen of cockroach and bird wings. He observed many differences in them though both are used for flying. He reported his observation to science teacher. His teacher praised him.
(a) Can you list the differences between wings of cockroach and bird?
(b) How birds are adapted for flying?
(c) How many legs are present in cockroach?
(d) What values of Sam are shown here?
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Answer:(a) Wings of birds have feathers and bones. Wings of birds are actually forelimbs of birds. Birds have only one pair of wings. The wings of cockroaches do not have feathers and bones. It is somewhat translucent. The cockroach has two pairs of wings.
(b) Birds have streamlined bodies with strong muscles and light bones which make them adaptive for flying.
(c) Cockroach has 3 pairs of legs.
(d) Sam is intelligent, curious, hard-working, and a good observer.
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