Q2 of 26 Page 284

Name five organisms which are now extinct and are studied from their fossils.

Five organisms which are now extinct:

Ammonite (marine mollusk animals)



Trilobite (marine arthropods)



Dinosaur (reptiles)



Sabre-toothed cat (predatory mammals)



Archaeopteryx (bird-like dinosaur)



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2

What are the mechanisms or methods of sex determination in different organisms?

 2

Name the ancestor of the following:

Broccoli, Kohlrabi, Kale

 2

Name five verities of vegetables which have been produced from ‘wild cabbage’ by the process of artificial selection.

 2

Choose the one term from the following which includes the other three: broccoli, wild cabbage, cauliflower, cabbage.