There are ……types of heterotrophic bacteria.
a) two
b) three
c) four
d) five
Explanation: saprophytic, parasitic and symbiotic bacteria
Heterotrophic bacteria that feed upon dead
organic material are…….bacteria.
a) saprophytic
b) parasitic
c) symbiotic
d) sulphur
Explanation: these are also called saprobes
Which of the following bacteria are the recycler of nutrients in environment and are called scavangers of earth?
a) saprophytic
b) parasitic
c) symbiotic
d) sulphur
Explanation: they have powerful enzyme system to break complex organic matter of dead plants and animals
An organism that adopts saprophytic mode of nutrition during part of its life is called…….
a) facultative saprophyte
b) facultative parasite
c) obligate saprophyte
d) obligate parasite
Heterotrophic bacteria that live in the host are…….bacteria.
a) saprophytic
b) parasitic
c) symbiotic
d) sulphur
Explanation: they do not have enzyme system
Which of the following is/are the hosts of parasitic bacteria?
a) humans
b) animals
c) plants
d) all of these
Explanation: many parasitic bacteria cause diseases and are called pathogens
