In the carbon cycle, atmospheric carbon dioxide is replenished by
Respiration
Transpiration
Lightening
Dentrification
Correct answer is A
No explanation has been provided for this answer.
Streak disease of maize is caused by
Virus
Nematode
Fungus
Bacterium
Correct answer is A
No explanation has been provided for this answer.
Physical properties of clay soil include
Low porosity and low capillarity
High porosity and high capillarity
Low porosity and high capillarity
High porosity and low capillarity
Correct answer is C
No explanation has been provided for this answer.
Which of the following factors is both a physical and a chemical agent of rock weathering?
Temperature
Animal
Water
Oxygen
Correct answer is C
No explanation has been provided for this answer.
High temperature and pressure convert sandstone to
Basalt
Quartzite
Coal
Limestone
Correct answer is B
No explanation has been provided for this answer.