Passage VII

The male-to-female body mass ratio (MFMR) of a species can be calculated as follows:

MFMR = Mm ÷ Fm

In this equation, Mm is the average body mass of adult males and Fm is the average body mass of adult females.

The figure shows the MFMR of some species within 4 primate groups: apes and humans; Old World monkeys; New World monkeys; and prosimians. A species with an MFMR of 1 is monomorphic with respect to body mass. A species with an MFMR different than 1 is dimorphic with respect to body mass. (Note: In the figure, MFMR values are calculated to the nearest tenth.)

37. Which of the following statements about the relative size of male and female chimpanzees and aye-ayes is consistent with the information provided?

Answer and Explanation

Your Answer is

Correct Answer is C

Explanation

According to the explanation of dimorphic and monomorphic in the fifth line of the last paragraph of the article, first look at the upper left picture, C (chimpanzees) corresponds to MFMR of 1.3, so it is dimorphic;

In the lower right corner of the picture, A ( aye-ayes) corresponds to MFMR is 1, so it is monomorphic