It depends on which Kingdom they are in. There are five kinds of Kingdoms:
Animalia (Animal)
Protista (Amoebae)
Fungi (Mushrooms)
Plantae (Plants)
Prokaryotae (Basically any orgasims that do not fit the other kingdoms or the "dumping ground")
For example any organisms in the same Kingdom would be related, no matter how distantly.
Trophic structure
Mutuaim, parasitism, consumerism
tropic structure
you can find the answer herehttp://www.takdangaralin.com/kinds-of-relationships-between-organisms/
The study of the diversity of organisms and the relationships among them.
No
phylogeny
yes
it is studied as ecology. relationships are responses, mineralisation, locomotion etc to the environment
A cladogram is used!
yes
study
Because they love u
scientists can infer how closely related the organisms are in an evolutionary sense