A graft.
An organism living in another organism is called parasite.
Families.
Several populations of organisms living together in one area is called an ecosystem.Added:Actually, several populations of organisms living together in one area is called a community.
a 100 pile of lakes.
co-inhabitants
A group of similar individuals living together in an area is called population.
A living thing that produces another living thing like itself is called a parent.
A group of lions living together is called a pride.
A group of Tigers that live together are called a pack.
The living part is biotic and the non-living part is called abiotic.
An organism living in another organism is called parasite.
Families.
cohabanation
diversity
A Pride of Lions.
parasite
A community or ecosystem.