The answer is because the body systems are different from eachother you tend to do different things from the other person/animal
A group of different organ systems forms a complex organism, such as fish and mammals.
living relationships
PETA is one, the Humane Society is another.
the mountain range which is a group of mountains is in a group of mountain systems or mountain ranges, which is in a mountain belt which is full of ranges and systems. :)
Can you think of another category for reptiles? The reptile is a cold blooded animal. Hello? Animal? Where else would you put "animal" but under "animal life"?
Animalia, animal group, animal life, animality, animals, brute creation, fauna, kingdom Animalia
There are no cells that are both plant and animal. However, a bacteria is classified in a different group
when the amount in one group is different then that of the other
because there are so many different living things
It depends on what they want to be. I know of one group called the ARG. Animal Rights group. and another called AAH. Animals Arn't Hurt.
Different countries and companies have different systems of rating insurance. You need to specify the country.
In this type of land formation, a range is a group of mountains, a chain is a group of mountain ranges, and a belt is a group of mountain ranges and systems.