单项选择题

What do people most probably believe in about a process

A．Its definition.
B．Its explanation.
C．Its examples.
D．Its main idea.
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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.
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
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