单项选择题

According to the passage, which of the following is TRUE of male dik-dik

A．He can in principle defend more than one female.
B．He practices monogamy.
C．He invests heavily in his offspring.
D．He is partly monogamous and partly polygamous.

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热门试题

单项选择题

We can infer that the chance for female marmoset and tamarin monkeys to have twin births depends on ______.

A．the number of male they have access to
B．the workload they have in bringing up the young
C．the time when they come into estrus
D．the size of the males' bodies

单项选择题

We can conclude from the first two paragraphs that whether a male practices monogamy of polygamy depends on ______.

A．the amount of nurturing the young
B．the sex of offspring
C．the attractiveness of his female partner
D．the time of conception