Q2 of 167 Page 208

Name the scientist who gave the theory of evolution.

Charles Robert Darwin gave the theory of evolution in his book ‘Origin of Species’ by means of Natural Selection.


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80

Pure-bred round-yellow pea seeds have genotype RRYY and the pure-bred wrinkled-green pea seeds have genotype rryy. Keeping this in mind, write the phenotypes of the following genotypes of hybrid pea seeds:

(a) Rryy


(b) rrYy


(c) rrYY


(d) RrYy


(e) RRyy

 1

What name is given to the sequence of gradual changes over millions of years in which new species are produced?

 3

State whether the following statement is true or false: Human beings have evolved from chimpanzees.

 4

State one characteristic which shows that birds are very closely related to dinosaurs.