The hepatic portal vein is unique because it
carries deoxygenated blood
begins and ends with capillaries
is the largest vein in mammals
carries digested food
is the shortest vein in mammals
Correct answer is D
No explanation has been provided for this answer.
The mineral nutrient that is most bound to the soil is
phosphorus
calcium
iron
potassium
Correct answer is C
No explanation has been provided for this answer.
A plant which has a horizontal underground stem is
rhizome
corm
creeper
tuber
bulb
Correct answer is A
No explanation has been provided for this answer.
It is black
it can supply usable nutrients to plants
the oxygen content is very high
artificial manure is added to it
it is not waterlogged
Correct answer is B
No explanation has been provided for this answer.
Which of the following causes pollution?
Consumption of canned drink
The addition of fertilizer to farmland
Respiration of living organism
Burning of refuse
Correct answer is D
No explanation has been provided for this answer.