Question

Q. 28. (i) Planaria, insects, octopus and vertebrates all have eyes. Can we group eyes of these animals together to establish a common evolutionary origin? Justify your answer.

(ii) "Birds have evolved from reptiles". State evidence to prove the statement.




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Answer 1

Answer:

2.Birds have evolved from reptiles. This is evident by a fossil bird named Archaeopteryx which has looks like a bird but the features have similarities with the reptiles such as it has feathers wings like birds but the teeth of Archaeopteryx look like those of reptiles.

Explanation:

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Answer 2

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(i) Planaria, insects, octopus and vertebrates all have eyes. Can we group eyes of these animals together to establish a common evolutionary origin? Justify your answer.

$\longrightarrow$ No we cannot group them together because the structure of the eye in each of the organism is different.

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(ii) "Birds have evolved from reptiles". State evidence to prove the statement.

$\longrightarrow$ Fossils of certain dinosaurs and reptiles show imprints of feathers along with their bones bu they could not fly presumably, using the feathers for insulation only. Later they evolved and adapted feathers for flight, thus becoming the ancestors of present day birds.

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