Do monkeys weigh less than a apes?

That's not quite right! It's a little more complex than just saying monkeys weigh less than apes. Here's why:

* Monkeys and apes are both primates. There's a lot of overlap in their characteristics.

* Size varies greatly within both groups. You have tiny marmoset monkeys and massive gorillas, which are apes.

* Some monkeys are larger than some apes. For example, a male mandrill monkey can be larger than a female gibbon, which is an ape.

It's more accurate to say:

* Apes are generally larger and heavier than monkeys.

* There are exceptions to this general rule.

Let me know if you have any other questions about primates!