单项选择题

Which statement is FALSE

A．Members of a species differ from one another.
B．differences between individuals are inherited.
C．Two organisms with identical genes may grow to different sizes.
D．More organisms are born than live to reproduce.

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热门试题

单项选择题

The main difference between natural and artificial selection is that human beings______.

A．control the direction of artificial selection
B．control the direction of natural selection
C．make new genes in artificial selection
D．make new genes in natural selection

单项选择题

Which of the following is NOT an example of artificial selection

A．the selection by a farmer of the best milk-producing cows for breeding
B．a breeder's allowing only the fastest horses to reproduce
C．the selection for reproduction of the best egg-laying chickens by the farmer
D．an increase in the number of giraffes with long necks because of a decline in the number of low-lying plants used for feeding