MCQ
What will improve the quantity of food production?
- APesticides
- BSynthetic hormones
- CEducation and guidance for consumers
- DOptimum use of land for agriculture
Explanation:
Optimum use of land for agriculture is the best way to improve the quanity of food production.
Cultivating the soil according to the crop pattern, proper utilization of land to get the best yield, practicing crop rotation, and getting maximum yield by making full use of agricultural land.
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Xylem is made of:
The gravitational force of attraction between two objects is x. Keeping the masses of the objects unchanged, if the distance between the objects is halved, then the magnitude of gravitational force between them will become:
$\frac{\text{x}}{4}$
$\frac{\text{x}}{2}$
$2\text{x}$
$4\text{x}$
The method maximum used in cattle breeding is:
Largest blood cells are:
Natural system of classification employs: