Protective foods in our diet are

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Protective foods in our diet are

AFats and vitamins

BCarbohydrates and minerals

CVitamins and minerals

DProteins and carbohydrates

Akhilesh ? Mar 21 '25 at 21:39

correct answer is: c
Explanation: Protective foods are essential for maintaining health and preventing diseases. They include nutrients like vitamins and minerals that support bodily functions and prevent deficiencies.

• OPTION a: Fats and vitamins
  - Fats are primarily for energy and not considered protective.
• OPTION b: Carbohydrates and minerals
  - Carbohydrates are the main energy source, so this is incorrect.
• OPTION c: Vitamins and minerals
  - Correct, as these are protective nutrients.
• OPTION d: Proteins and carbohydrates
  - Both provide structure and energy, not protection.

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In increasing sequence, the major elements present in the human body are

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In increasing sequence, the major elements present in the human body are

ACalcium, iron, sodium, phosphorus

BCalcium, phosphorus, potassium, sulphur

CCalcium, iron, sodium, sulphur

DCalcium, potassium, phosphorus, iron

Akhilesh ? Mar 21 '25 at 21:23

correct answer is: OPTION b: Calcium, phosphorus, potassium, sulphur
Explanation: The major elements in the human body, in order of abundance, are calcium, phosphorus, potassium, sodium, sulphur, and iron. Among the given options, OPTION b correctly lists calcium, phosphorus, potassium, and sulphur in the correct sequence of abundance, starting with the most abundant.

• OPTION a: Incorrect because it places iron before sodium and phosphorus.
• OPTION b: Correct as it follows the proper order of abundance.
• OPTION c: Incorrect because it misplaces iron and sodium.
• OPTION d: Incorrect because it places potassium before phosphorus.

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The image formed on the retina of a human eye is

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The image formed on the retina of a human eye is

AReal and upright

BReal and inverted

CImaginary and upright

DImaginary and inverted

Akhilesh ? Mar 21 '25 at 21:14

correct answer is: OPTION b
Explanation: The human eye forms a real image on the retina, which is inverted due to the convex lens.

• OPTION a: Incorrect because the image is inverted, not upright.
• OPTION b: Correct as the image is real and inverted.
• OPTION c: Incorrect because the image is real, not imaginary.
• OPTION d: Incorrect because the image is real and inverted, not imaginary.

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Which of the following is an example of a plant that bears seeds but not fruits ?

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Which of the following is an example of a plant that bears seeds but not fruits ?

ACotton Plant

BPeepal tree

CEucalyptus tree

DPine tree

Akhilesh ? Mar 21 '25 at 21:10

correct answer is: Pine tree
Explanation: Pine trees produce seeds in cones, which are not classified as fruits since they originate from modified branches rather than floral ovaries.

• OPTION a: Cotton plants produce cotton bolls, which are fruits containing seeds.
• OPTION b: Peepal trees produce small, round fruits that are consumed by birds.
• OPTION c: Eucalyptus trees have seed pods that are considered fruits as they develop from the flower's ovary.
• OPTION d: Pine trees bear seeds in cones, which are not fruits, making them the correct answer.

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Biological fixation of nitrogen occurs most commonly in which of the following crops ?

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Biological fixation of nitrogen occurs most commonly in which of the following crops ?

APulses

BRice

CWheat

DNone of these

Akhilesh ? Mar 21 '25 at 20:55

correct answer is: a: Pulses
Explanation: Biological nitrogen fixation occurs in plants that have symbiotic relationships with nitrogen-fixing bacteria, such as Rhizobia. These bacteria live in root nodules of legumes (pulses) like beans and lentils, converting atmospheric nitrogen into a usable form for the plant. This process is most common in pulses, not cereals like rice or wheat.

• OPTION a: Pulses
  - Correct, as pulses are legumes that fix nitrogen through root nodules.
• OPTION b: Rice
  - Incorrect, rice does not have nitrogen-fixing nodules.
• OPTION c: Wheat
  - Incorrect, wheat lacks the symbiotic bacteria for nitrogen fixation.
• OPTION d: None of these
  - Incorrect, pulses are correct.

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