The detection of vibro cholera in public drinking water is a sign of
clean water
outbreak of disease
water pollution
decayed organisms in the water
Correct answer is C
No explanation has been provided for this answer.
The use of water closet and septic tanks is preferred to the use of bucket and pit latrines because
it is cost effective
contaminated faeces are completely kept away from flies
the water for flushing contains chlorine which kills the germs
It prevents flies from breeding
Correct answer is B
No explanation has been provided for this answer.
Hygrometer
Barometer
Photometer
Air pressure disc
Correct answer is B
No explanation has been provided for this answer.
The following are abiotic components of the ecosystem except
bacteria
topography
water
wind
Correct answer is A
No explanation has been provided for this answer.
The area around the earth where life activities go on is referred to as
biosphere
lithosphere
habitat
ecosystem
Correct answer is A
No explanation has been provided for this answer.