Q14 of 167 Page 208

Name five varieties of vegetables which have been produced from 'wild cabbage' by the process of artificial selection.

Brassica oleracea (wild cabbage) is modified by artificial selection to produce many varieties of vegetables. 5 of such varieties are- Broccoli, Kohlrabi, Kale, Cabbage and Cauliflower.


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12

Out of the wing of a bird, wing of an insect and the wing of a bat:

(a) Which two are homologous organs?


(b) Which two are analogous organs?

 13

Why are human beings who look so different from each other in terms of size, color and looks said to belong to the same species

 15

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

 16

Fill in the following blanks with suitable words:

(a) The human forelimb and bat's forelimb are examples of..................... organs whereas an insect's wing and a bat's wing are an example of ..................... organs.


(b) The evolution of eye is an example of evolution by .....................


(c) The scientific name of all human beings is....................


(d) Broccoli has evolved from ..................... by the process of artificial selection.


(e) The theory of natural selection for evolution was proposed by……………..