1.  Shrubs

2.  Tall tree

4.  None of the above

1.  Symbiosis

2.  Parasitism

3.  Predation

1.  K

3.  D

4.  T

1.  Psammophytes

2.  Eremophyte

4.  Chersophyte

2.  Community

3.  Metapopulation

4.  All of the above

1.  Crab and Sea anemone – Commensalism

2.  Rhizobium and roots of pea plant – Symbiosis

3.  Bacteria and gut of ruminants – Mutualism

1.  Fungivorous

3.  Carnivorous

4.  None of the above

1.  Mutualism

2.  Parasitism

3.  Predation

1.  Euryhaline

3.  Catadromou

4.  Anadromous

1.  birth species

3.  key stone specie

4.  edge species