9th Grade > Biology
IMPROVEMENT IN FOOD RESOURCES MCQs
Total Questions : 56
| Page 1 of 6 pages
Answer: Option B. -> Hybridisation
:
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.
:
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.
Answer: Option A. -> Nitrogen
:
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 iswhy most plantfertilisers consist of NPK primarily.
∙ Apart from these, for proper functioning and metabolic activities of the plant, they also needmany micronutrients such as zinc, chlorine, copper, boron, iron, magnesium, etc.
:
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 iswhy most plantfertilisers consist of NPK primarily.
∙ Apart from these, for proper functioning and metabolic activities of the plant, they also needmany micronutrients such as zinc, chlorine, copper, boron, iron, magnesium, etc.
Answer: Option B. -> Organic farming
:
B
The farming technique in which there is minimum or no use of chemical fertilizers, herbicides and insecticides is called organic farming. The manure used in this case is made from organic waste and is devoid of any harmful chemicals.
:
B
The farming technique in which there is minimum or no use of chemical fertilizers, herbicides and insecticides is called organic farming. The manure used in this case is made from organic waste and is devoid of any harmful chemicals.
Answer: Option B. -> Low maintenance requirements
:
B
The cross-breeding programs between Indian and foreign breeds of birds are focused on developing following.
i)New varieties with increased number and quality of chicks.
ii) Increased tolerance to high temperature.
iii) Low maintenance.
iv) Reduction in the size of the egg-laying bird with ability to utilise more fibrous andcheaper diets formulated using agricultural by-products.
:
B
The cross-breeding programs between Indian and foreign breeds of birds are focused on developing following.
i)New varieties with increased number and quality of chicks.
ii) Increased tolerance to high temperature.
iii) Low maintenance.
iv) Reduction in the size of the egg-laying bird with ability to utilise more fibrous andcheaper diets formulated using agricultural by-products.
Answer: Option B. -> Aquaculture
:
B
Aquaculture is farming of aquatic organisms like fish, molluscs, algae, etc. Both freshwater and saltwater organisms can be cultured in controlled conditions.
:
B
Aquaculture is farming of aquatic organisms like fish, molluscs, algae, etc. Both freshwater and saltwater organisms can be cultured in controlled conditions.
Answer: Option A. -> True
:
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.
:
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.
Answer: Option A. -> Insects
:
A
Storage losses in agriculturecan be due to biotic and abiotic factors. Biotic factors which may cause crop storage losses arerodents (mice, rats), insects, fungi, bacteria, etc.
Some abiotic factors that result in storage losses areimproper temperature, moisture conditions, etc.
:
A
Storage losses in agriculturecan be due to biotic and abiotic factors. Biotic factors which may cause crop storage losses arerodents (mice, rats), insects, fungi, bacteria, etc.
Some abiotic factors that result in storage losses areimproper temperature, moisture conditions, etc.
Answer: Option A. -> True
:
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.
:
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.
Answer: Option A. -> True
:
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.
:
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.
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