A well-developed cerebrum
A well-developed cerebrum is the structure in primates that enables them to develop complex social systems. Cerebrum is Latin for brain.
A primate is a group of mammals that includes humans, apes, monkeys, and prosimians like lemurs. They are characterized by having grasping hands and feet, forward-facing eyes, and well-developed brains. Primates are known for their complex social behaviors and intelligence.
The noun 'laughter' is an uncountable noun. Units of laughter are expressed in amounts such as some laughter, a lot of laughter, much laughter, etc.
Primates are characterised by large brains relative to other mammals. Their eyes face forward, giving them stereoscopic vision and vision is the sense they rely on most rather than smell like other mammals. Most primates with a few exceptions have opposable thumbs and have developed adaptations to climb trees. Primate babies take a long time to mature because of their brain size, relative to non-primates. Non-human primates have oestrus cycles and many species display swellings during their fertile period.
All chimpanzees are primates but not all primates are chimpanzees. Humans, for instance, are primates.
If you mean "Are all mammals primates?" then the answer is no. Primates are a type of mammal. All primates are mammals. Not all mammals are primates. For example, cats, dogs, bears, rodents... these are all mammals, but not primates.
Laughter.
No, dogs are not primates. Dogs belong to the mammalian family Canidae, while primates belong to the order Primates, which includes humans, apes, monkeys, and lemurs.
Laughter is a beautiful sound. I was angered by his laughter after I fell.
laughter is not bad at all. There fore laughter is actually a good thing.
The possessive form is the students' laughter.