Viruses are considered to be living organisms because they
possess transmittable characters
move from one place to another
respond to stimulation
ingest food materials
Correct answer is A
No explanation has been provided for this answer.
Farmers practise crop rotation because it
helps to prevent soil erosion
allows two crops to be planted at the same time
helps to conserve soil fertility
is an alternate to shifting cultivation
Correct answer is C
Crop rotation is a practice used to maintain nutrients in an agricultural soil.
Most irrigated lands often become unproductive in later years because of
loss of fertility
increase in salinity
soil erosion
loss of water
Correct answer is C
Disadvantages of irrigation:
- Excess water in the soil leads to waterlogging
40.0g per 100 g dry soil
4.4g per 100g dry soil
4.0 g per 100g dry soil
0.4g per 100g dry soil
Correct answer is C
No explanation has been provided for this answer.
Which of the following is a dangerous product of coal burning?
Sulphur dioxide
Carbon dioxide
Carbon
Nitrogen
Correct answer is A
No explanation has been provided for this answer.