Free Improvement in Food Resources 01 Practice Test - 9th Grade
Question 1
Xanthium, parthenium, cyperinus are examples of ________ .
weeds
fodder crops
pulses
cereals
SOLUTION
Solution : A
Weeds are fast growing, unwanted plants growing in cultivated fields which take up nutrients and reduce the growth of the crop. Therefore, removal of weeds from cultivated fields during the early stages of crop growth is essential for a good harvest. Weedicides can be effective for removal of weeds. Xanthium, parthenium and cyperinus are some examples of weeds.
Question 2
With respect to the following statements, choose the correct answer.
i.Food security depends on both, the availability of food and access to it.
ii.Mixed farming degrades the nutrient quality of the soil.
iii.Fertilisers are commercially produced plant nutrients.
SOLUTION
Solution : B
Food security depends upon both, the availability of food and access to it. Just over production does not guarantee food security. People should have money to buy food for themselves.
Mixed farming involves the growth of multiple plants simultaneously on the same field. This increases the quality of soil, if the leguminous plants are grown along with crops. Fertilisers, like urea, are commercially produced plant nutrients.
Question 3
Cultivation of two or more crops together in the same field is called:
Mixed cropping
Multiple cropping
Crop rotation
Inter-cropping
SOLUTION
Solution : A
Mixed cropping is a method in which two or more crops of a completely different type is grown simultaneously on the same piece of land. For example, wheat and gram are grown using this pattern. Multiple cropping is the practice of growing two or more crops in the same piece of land in the same growing seasons instead of one crop. Crop rotation is growing of different crops on a piece of land in a pre-planned succession. Inter-cropping is growing two or more crops simultaneously on the same field in a definite pattern.
Question 4
A majority of India's population is directly dependent upon agriculture.
True
False
SOLUTION
Solution : A
India is an agricultural country. More than 60 per cent of the population is engaged in agriculture and allied activities like animal husbandry. Agricultural activities have seen immense growth since independence. The fertile land, favourable weather conditions and the growing population has played a major role in the growth of agriculture.
Question 5
Which of the following is a fresh water prawn?
SOLUTION
Solution : C
Fresh-water prawns are prawns grown in freshwater for human consumption. Among the given options, Macrobrachium rosenbergii is the only fresh-water prawn. Peneaus monodon is a marine prawn, common carp is a fresh-water fish and bombay duck is a marine fish.
Question 6
Which of the following is concerned with fish farming?
Apiculture
Aquaculture
Horticulture
Sericulture
SOLUTION
Solution : B
Aquaculture is farming of aquatic organisms like fish, molluscs, algae, etc. Both freshwater and saltwater organisms can be cultured in controlled conditions.
Question 7
Which of the following varieties of honey bee are correctly matched to their scientific names?
Apis mellifera - Italian bee
Apis dorsata- Little bee
Apis cerana indica - Indian bee
Apis florae - Rock bee
SOLUTION
Solution : A and C
Following are the scientific names for different varieties of honey bee:
∙ Apis cerana indica - Indian bee
∙ Apis dorsata - Rock bee
∙ Apis florae - Little bee
∙ Apis mellifera - Italian bee
Out of all, the Italian bee is used widely for the commercial production of honey.
Question 8
Catla and Rohu are the examples of indigenous freshwater fishes.
True
False
SOLUTION
Solution : A
Catla and Rohu are examples of indigenous freshwater fishes. Freshwater fishes are those that spend some or all of their lives in fresh water, such as rivers, ponds and lakes.
In a pond, catla fish are surface feeders while rohu fish feed in the middle layers of the pond.
Question 9
The nutrients which are required by the plants in very small quantities are called ___.
SOLUTION
Solution : A
The nutrients required by an organism can be broadly classified into two depending on the quantity required by the organism.
Macronutrients are required in large quantities while micronutrients are required in trace or very small amounts.
In plants, the macronutrients are nitrogen, phosphorus and potassium (NPK) while the micronutrients include boron, iron, manganese, etc.
Question 10
A variety of crops of desired characteristics can be achieved by introducing a gene.
SOLUTION
Solution : A
Crop variety improvement plays a very important role in order to improve crop yield.
This can be done by finding a crop variety that can give a good yield. The desired quality of this crop can be introduced into other crops by introducing its gene of desired quality, like high yield. These are genetically modified crops.