Because they've all evolved adaptively to different environments and different roles in those environments.
Perhaps a better explanation would be that God had a hand in the creation of everything and He likes lots of variety.
Ecology is the study of how living things interact with each other and their environment
Ecology is the study of how living things interact with each other and their environment
The union of two living things that depend on each other is co-dependence.
Ecology is the study of how living things interact with each other and their environment
biology
Yes.
Economics is the study of production, distribution and consumption of wealth. The study of living things in relation to each other is known as ecology.
A group of living things is called a population if they belong to the same species, a community if they comprise different species living in the same area, and an ecosystem if they interact with each other and their physical environment.
Ecosystem
it depends on which animal
Every living creature needs to breath to live.
ECOSYSTEM- is an environment where LIVING THINGS and NON-LIVING THINGS interact with each other..BIOTIC and ABIOTIC are the components of ecosystem....~*MARGE*~