Q19 of 55 Page 247

Some dinosaurs had feathers although they could not fly but birds have feathers that help them to fly. In the context of evolution, this means that:

The presence of feathers in dinosaurs and their development as an appendage in birds shows the evolutionary process.

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17

Which of the following statements is incorrect?

 18

According to the evolutionary theory, formation of a new species is generally due to:

 1

Write true or false for the following statements:

In humans, there are two pairs of sex chromosomes.

 2

Write true or false for the following statements:

In snails, individuals can change sex, indicating that sex is not genetically determined in them.