1.  unicellular decomposers

2.  unicellular consumers

4.  multicellular consumers

2.  Diploid

3.  Polyploidy

4.  None of these

1.  variety

2.  sub-species

3.  species

1.  Plantae

2.  Fungi

3.  Animalia

1.  Carolus Linnaeus

2.  George Bentham and Joseph Dalton Hooker

3.  Aristotle

4.  Theophrastus

1.  Bentham and Hooker

2.  Bessey

3.  Aristotle

5.  Lamarck

1.  Protista

3.  Plantae

4.  Animalia

5.  Fungi

1.  sibling species

2.  sympatric species

4.  polytypic species

5.  Both (a) and (b)

2.  name of author

3.  place of discovery of plant

4.  any one of the above

1.  according to floral similarities

2.  of plants in order of their increasing complexities

4.  according to all morphological characters