I and II only
I and IV only
I,III and IV
I,II,III and IV
Correct answer is D
No explanation has been provided for this answer.
The thin layer of unconsolidated mineral particles and organic matter covers land surface is called
soil
sialic rock
earth's crust
biosphere
Correct answer is A
No explanation has been provided for this answer.
Loamy soils are better for agriculture than other soil types because they
are black in colour
retain air,moisture and humus
are rich in mineral nutrients
are rich in humus only
Correct answer is B
No explanation has been provided for this answer.
The ultimate source of energy in the biosphere is
the moon
the sun
petroleum
electricity
Correct answer is B
No explanation has been provided for this answer.
Which of the following countries is the leading producer of petroleum?
Algeria
Libya
Egypt
Gabon
Correct answer is B
No explanation has been provided for this answer.