9th Grade > Biology
IMPROVEMENT IN FOOD RESOURCES MCQs
:
B
∙ Nutrients in the right proportions are required for the overall growth of our body.
∙ Food items like oil, cheese, ghee, etc., are rich sources of fats.
∙ Vitamins and minerals are present in fruits and vegetables.
∙ Cereals, potato, rice, etc., are rich in carbohydrates.
∙ Protein-rich food includes egg, meat, milk, meat, etc.
∙ From the options, vitamins-pizza is a wrong match, as pizza is junk food and vitamins are mostly provided by vegetables and fruits.
:
A
∙ The macronutrients in plants include nitrogen, phosphorus and potassium (NPK). These elements are known as macronutrients because the plants require them in large quantities. This is why most plant fertilisers consist of NPK primarily.
∙ Apart from these, for proper functioning and metabolic activities of the plant, they also need many micronutrients such as zinc, chlorine, copper, boron, iron, magnesium, etc.
:
B and C
Following methods can be used to control the growth of weeds:
i. Proper use of chemicals (weedicides)
ii. Proper seed bed preparation
iii.Sowing of crops on time
iv. Intercropping and crop rotation
:
A and B
Animals which provide milk are called milch animals or dairy animals. For example: goats, buffalo, cows, etc.
:
A
Cattle are reared for two main purposes.
i) Cattle working in farms are called draught animals. For example- Bull, Donkey.
ii) Cattle producing milk known as milch/dairy animals. For example- Red Sindhi, Sahiwal cows.
:
C
The factors which influence crop production can be grouped into two types: biotic and abiotic. The factors which are related to living beings are called biotic factors. Non-living factors are called abiotic factors. For example, salinity, temperature etc.
:
A
The main goals of crop variety improvement are:
i. higher yield
ii. improved quality
iii.change in maturity period
iv. wider adaptability
v. desirable agronomic (plant/crop) characteristics
:
D
Animal husbandry includes scientific management of animal livestock. It includes rearing of animals such as goat, sheep, cattle, hen, pigs etc. These animals are reared for milk, meat or for farm work.
:
C
Small storage reservoirs which intercept and store the run-off of small catchment area are called tanks. Tanks are an important source of irrigation for far-flung villages. It acts as a artificial reservoir of any size.