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problem 1) A pair of mice has, on average, a litter of six babies. Assuming

(i) that there are equal numbers of males and females in the litters,

(ii) that the offspring breed freely amongst themselves, how many mice will there be after three generations?

problem 2)(a) Give three exs of types of competition between members of an animal species in the same population.

(b) In each case suggest a variation that might help an individual to compete more effectively.

problem 3) For a beneficial variation to have a selective advantage in the course of evolution, it must be ….. A ….. by the offspring.

problem 4) Evolution is thought to come about as a result of ….. A ….. which produce new ….. B ….. These gradually replace the original population as a result of …..C …..

problem 5) Which of the following statements is most acceptable from an evolutionary point of view?

(a) Apes and humans have evolved from a common ancestor.

(b) Humans have evolved from apes.

(c) Certain apes have gradually evolved into humans.

(d) Apes and humans are related.

problem 6) What characteristics might a breeder select for in

(i) a cereal crop,

(ii) a farm animal?

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  • Category:- Biology
  • Reference No.:- M95203

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