NEET MCQs Practice on Strategies for Enhancement in Food Production Class-XII Biology, Free unlimited practice on Strategies for Enhancement in Food Production Class-XII Biology Mcqs

Question 41 of 100

📘 CLASS XII

Host crop plants resist insects through various characteristics. Read the statements below:

I. Hairy leaves in cotton are associated with resistance to jassids.
II. Solid stems in wheat lead to non-preference by the stem sawfly.
III. Smooth-leaved and nectar-less cotton varieties do not attract bollworms.
IV. Maize stem borers are repelled by high aspartic acid, low nitrogen and low sugar content in maize.

Which statements are correct?

All the statements are correct. Hairy leaves, solid stems, nectar-less cotton and favourable biochemical composition are well-known host plant resistance mechanisms against insect pests.

Question 42 of 100

📘 CLASS XII

Analyse the following statements about pest-resistant varieties:

I. Pusa Gaurav is a variety of flat bean resistant to aphids.
II. Pusa Sem 2 and Pusa Sem 3 are varieties of flat bean resistant to jassids, aphids and fruit borer.
III. Pusa Sawani and Pusa A-4 are varieties of okra (bhindi) resistant to shoot and fruit borer.
IV. Shoot and fruit borer is the primary pest affecting Pusa Gaurav.

Select the correct option.

Pusa Sem 2 and Pusa Sem 3 are flat bean varieties resistant to jassids, aphids and fruit borer. Pusa Sawani and Pusa A-4 are okra varieties resistant to shoot and fruit borer. Pusa Gaurav is a Brassica variety resistant to aphids.

Question 43 of 100

📘 CLASS XII

Evaluate the objectives and traits associated with biofortification:

I. Biofortification is the breeding of crops with higher levels of vitamins, minerals, protein or healthier fats.
II. Biofortification objectives include improving protein content, protein quality, oil content and oil quality.
III. Vitamin content and micronutrient/mineral content are excluded from biofortification objectives.
IV. Micronutrient deficiencies like iron, vitamin A, iodine and zinc are collectively known as 'manifest hunger'.

Choose the correct option.

Biofortification aims to improve protein, oil, vitamin and mineral content of crops. Statement III is incorrect because vitamins and minerals are major objectives. Statement IV is incorrect because micronutrient deficiency is known as hidden hunger, not manifest hunger.

Question 44 of 100

📘 CLASS XII

Consider the following statements regarding successfully developed biofortified crop lines:

I. In 2000, maize hybrids with twice the amount of lysine and tryptophan were developed.
II. The wheat variety Atlas 66, having a high protein content, has been used as a donor for improving cultivated wheat.
III. It has been possible to develop an iron-fortified rice variety containing over ten times as much iron.
IV. Atlas 66 is an iron-enriched variety of rice.

Select the correct combination.

Maize hybrids containing twice the lysine and tryptophan were developed in 2000. Atlas 66 is a high-protein wheat donor variety. Iron-fortified rice contains over five times, not ten times, as much iron, and Atlas 66 is wheat, not rice.

Question 45 of 100

📘 CLASS XII

Evaluate these statements regarding vegetable varieties released by IARI, New Delhi:

I. Vitamin A enriched carrots, spinach and pumpkin have been released by IARI, New Delhi.
II. IARI released vitamin C enriched bitter gourd, bathua, mustard and tomato.
III. Iron and calcium enriched spinach and bathua were also developed by IARI.
IV. Protein-enriched beans released by IARI include only French beans and not peas.

Which statements are correct?

IARI has released vitamin A enriched carrots, spinach and pumpkin; vitamin C enriched bitter gourd, bathua, mustard and tomato; and iron and calcium enriched spinach and bathua. Protein-enriched beans include broad bean, lablab bean, French bean and garden pea.

Question 46 of 100

📘 CLASS XII

Regarding Single Cell Protein (SCP) and Spirulina, analyse the statements below:

I. Single Cell Protein (SCP) is an alternate source of proteins for animal and human nutrition.
II. Spirulina can be grown easily on starch-rich wastewater from potato processing plants, straw, molasses and sewage.
III. Cultivation of Spirulina increases environmental pollution by releasing organic wastes.
IV. Spirulina provides biomass rich in protein, minerals, fats, carbohydrates and vitamins.

Select the correct option.

Single Cell Protein is an alternative source of protein. Spirulina grows well on starch-rich wastewater, straw, molasses, manure and sewage, producing nutrient-rich biomass. Since it utilizes waste, it helps reduce environmental pollution.

Question 47 of 100

📘 CLASS XII

Evaluate the biomass capabilities of Single Cell Protein:

I. Shift from grain to meat diets increases the demand for cereals because it takes 3-10 kg of grain to produce 1 kg of meat.
II. More than 25 per cent of the human population is suffering from hunger and malnutrition.
III. Methylophilus methylotrophus is a fungal species eaten as an edible mushroom.
IV. Due to its high growth and biomass production rate, Methylophilus methylotrophus is expected to produce 25 tonnes of protein.

Choose the correct option.

Producing meat requires 3-10 kg of grain for every kilogram of meat. More than one-fourth of the global population suffers from hunger and malnutrition. Methylophilus methylotrophus is a bacterium, not a fungus, and is capable of producing about 25 tonnes of protein because of its rapid growth.

Question 48 of 100

📘 CLASS XII

Evaluate the following statements regarding the products and requirements of bee-keeping:

I. Honey is a food of high nutritive value and also finds use in the indigenous systems of medicine.
II. Beeswax is a waste product of the hive and is of no commercial or industrial use.
III. Apiculture is a highly labor-intensive industry that requires continuous physical monitoring of bees.
IV. Increased demand for honey has established bee-keeping as an income-generating industry.

Which of the statements given above are correct?

Honey has high nutritive as well as medicinal value. Beeswax is commercially important and is used in the preparation of cosmetics, polishes and several other products. Bee-keeping is relatively easy and is not labor-intensive. The increasing demand for honey has established apiculture as an important income-generating industry.

Question 49 of 100

📘 CLASS XII

Successful bee-keeping requires certain crucial practices. Consider the following statements:

I. Successful bee-keeping requires specialized knowledge of the nature and habits of bees.
II. Suitable locations for hiving are highly restricted and cannot include roofs or courtyards.
III. Catching and hiving of swarms is one of the important points for successful apiculture.
IV. Beehives must be maintained uniformly without any changes across different seasons.

Choose the correct option representing correct statements.

Successful apiculture requires knowledge of the nature and habits of bees, proper catching and hiving of swarms, and seasonal management of beehives. Beehives can be maintained in courtyards, verandahs or on rooftops. Therefore, Statements II and IV are incorrect.

Question 50 of 100

📘 CLASS XII

Regarding the role of honeybees in crop fields, evaluate the following statements:

I. Bees are the pollinators of many crop species like sunflower and Brassica.
II. Keeping beehives in crop fields during the flowering period decreases pollination efficiency to save flower energy.
III. Apple and pear are crops whose yields are improved by bee pollination.
IV. Keeping beehives in fields during flowering is beneficial for both crop yield and honey yield.

Which of these statements are correct?

Bees are important pollinators of crops such as sunflower, Brassica, apple and pear. Keeping beehives in crop fields during flowering increases pollination efficiency, thereby improving both crop yield and honey production. Hence, Statement II is incorrect.

Strategies for Enhancement in Food Production MCQs