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In organisms, some changes pertain to body cells and are not inherited, whereas some changes pertain to germ cells and are inheritable. a) Name the two

types of variations respectively. b) Explain two ways by which individuals with a particular trait may increase in a population.


(A)  Changes pertain to body cells & are not inherited - Acquired traits.
       Changes pertain to germ cells are inheritable - Inherited traits.

(B) The 2 ways are :-
      1.  By Genetic drift. 
      2. By Natural selection...
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