Free Improvement in Food Resources 02 Practice Test - 9th Grade
Question 1
Which among the following are biotic factors which cause crop storage losses?
Insects
Drought
Temperature
SOLUTION
Solution : A
Storage losses in agriculture can be due to biotic and abiotic factors. Biotic factors which may cause crop storage losses are rodents (mice, rats), insects, fungi, bacteria, etc.
Some abiotic factors that result in storage losses are improper temperature, moisture conditions, etc.
Question 2
Which of these is a macronutrient used by plants?
Nitrogen
Zinc
Copper
Chlorine
SOLUTION
Solution : 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.
Question 3
Excessive use of chemicals in agriculture can cause environmental pollution.
True
False
SOLUTION
Solution : A
Many chemicals such as fertilisers, insecticides, pesticides, etc are used in agriculture to increase the quality and quantity of harvest. Excessive use of these chemicals creates problems since they can be poisonous to many plant and animal species and cause environmental pollution.
Question 4
Which of the following methods can be used for improving crop variety?
Usage of more fertilizers
SOLUTION
Solution : B
Crop variety can be improved by hybridisation which involves crossing between genetically dissimilar plants to produce plants with superior traits. Crops can also be improved by using genetic engineering in which a desired gene is introduced into a particular plant. This technique aims at specific and targeted changes in the plant.
Question 5
Which of the following is incorrectly matched?
SOLUTION
Solution : 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.
Question 6
Which of the following measures can be taken for the proper maintenance of dairy animals?
Providing balanced and complete diet for healthy growth.
Regular vaccination to fight against diseases.
SOLUTION
Solution : A, B, and C
For efficient and adequate maintenance of dairy animals, one must ensure proper cleaning and sanitation of the animal shelter facilities.
Animals should be provided with a balanced, hygienic and complete diet.
To prevent the mass wipe out of farm animals due to a fatal disease, it is very important to get the animals vaccinated regularly.
Question 7
Which of the following methods can be used to control the growth of weeds on the fields?
SOLUTION
Solution : 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
Question 8
Animals which provide milk are called ___ animals.
SOLUTION
Solution : A and B
Animals which provide milk are called milch animals or dairy animals. For example: goats, buffalo, cows, etc.
Question 9
Broiler chickens are fed with vitamin-rich supplementary feed for good growth rate and better feed efficiency.
SOLUTION
Solution : A
Broiler chickens are fed with vitamin-rich supplementary feed for good growth rate and better feed efficiency. Care is taken to avoid mortality and to maintain feathering and carcass quality. They are produced as broilers and sent to market for meat purposes.
Question 10
Cattle used for farm labour are called draught animals.
SOLUTION
Solution : 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.