Question

Name the organisms which do not derive energy
directly or indirectly from sun
(a) chemosynthetic bacteria
(b) pathogenic bacteria
(c) symbiotic bacteria
(d) mould

Answer 1

Answer:

a chemosynthetic bacteria

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Answer 2

Chemosynthetic bacteria do not derive energy directly or indirectly from sun.

It is a mode of production of food.

* They are different from photosynthetic bacteria that derive their energy from the sun.

* They derive energy from inorganic molecules( as given in the word 'chemi').

* These compounds are then converted by chemical reactions into organic substances( mainly sugars) which are utilised by the bacteria as food.

Example: sulphur bacteria.