Which of the following is not a way to reduce air pollution?
Siting factories and power stations away from residential areas
Building tall factory chimneys
Passing waste gases through filters and absorbers
Using lead-free petrol in cars
Recycling tins, cans, and bottles
Correct answer is B
No explanation has been provided for this answer.
Which of the following is an autotrophic mode of nutrition?
Chemosynthesis
Saprophytism
Parasitism
Symbiosis
Commensalism
Correct answer is A
No explanation has been provided for this answer.
Which of the following reagents is used to test for starch?
Million’s reagent
Fehling’s solution
Sudan III
Iodine solution
Benedict’s solution
Correct answer is D
No explanation has been provided for this answer.
Which of the following is a nitrifying bacterium
Nitrobacter
Rhizobium
Azotobacter
Clostridium
Nitrosomonas
Correct answer is A
No explanation has been provided for this answer.
Thunderstorm can be beneficial to plants because it
kills the pests that attacks crops
destroys some of the major crops
adds nitrates to the soil
adds lime to the soil
makes rain water available to plants
Correct answer is C
No explanation has been provided for this answer.