Q 01/05

What do most monkeys have that apes lack?

A) Larger brain size

B) Presence of a tail

C) Bipedal locomotion

D) Full colour vision

Answer · why

B) Presence of a tail

Presence of a tail, even a tiny nub, is the usual tell; the few nearly tailless monkeys were long miscalled apes for exactly that reason.

Q 02/05

A 2017 review found about 60% of primate species to be what?

A) Nocturnal

B) Monogamous

C) Threatened

D) Tailless

Answer · why

C) Threatened

Threatened with extinction, that is: the review also found three in four primate species in decline, mostly because farming, logging and hunting are e...

Q 03/05

Which of these primate groups is classified as an Old World monkey?

A) Marmoset

B) Langur

C) Spider Monkey

D) Squirrel Monkey

Answer · why

B) Langur

Langurs are Old World monkeys; India's grey langurs are held sacred by Hindus, so they wander temples and villages freely, even raiding crops and shop...

Q 04/05

Which of these is a New World monkey?

A) Baboon

B) Mandrill

C) Colobus

D) Titi

Answer · why

D) Titi

Titis are New World monkeys that pair for life, and a bonded couple often sits side by side with tails twined together.

Q 05/05

The ancestors of New World monkeys are thought to have reached South America by rafting across which ocean?

A) The Pacific

B) The Atlantic

C) The Indian

D) The Southern

Answer · why

B) The Atlantic

The Atlantic was much narrower then, and the monkeys' ancestors are thought to have drifted over from Africa on mats of vegetation, perhaps hopping be...