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Past Questions
Question 3201
waec 2013
a
nitrifying bacteria
b
denitrifying bacteria
c
putrefying bacteria
d
saprophytic bacteria
Question 3202
waec 2013
a
comparing living and non-living things
b
measuring productivity
c
conducting census
d
labelling the living organisms
Question 3203
waec 2013
a
destroy pathogens in their bodies
b
increase the production of white blood cells
c
stimulate the production of antibodies
d
simulate the production of antigens
Question 3204
waec 2013
a
commensalism
b
epiphytism
c
mutualism
d
saprophytism
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