Advertisements
Advertisements
प्रश्न
Advertisements
उत्तर
Water is necessary for our body because:
(i) Water acts as a solvent for many organic and inorganic compounds
(ii) Water facilitates the movement of food materials, waste products, and other chemical substances in the cytoplasm and circulatory process.
(iii) It plays an important role in regulating body temperature and osmotic pressure of the body fluids.
(iv) Water serves as a good medium for various metabolic reactions.
संबंधित प्रश्न
Give the one-word substitute for the following:
Insect-eating organism.
Classify according to food-type.
Deer
Classify according to food-type.
Buffalo
Classify according to food-type.
Tick
Very Short Answer Type Questions:
Name two energy-providing nutrients.
Short Answer Type Questions:
A small child became very thin and lean and later he became so weak that he could not move. Which nutrients should he eat so as to improve his health?
By eating rice alone, we can fulfill nutritional requirement of our body.
Differentiate
Kwashiorkar from Marasmus
Which of the following statements is/are correct?
- All green plants can prepare their own food.
- Most animals are autotrophs.
- Carbon dioxide is not required for photosynthesis.
- Oxygen is liberated during photosynthesis.
Choose the correct answer from the options below:
Take a potted plant with broad leaves. Take two strips of black paper and cut out a small square in the centres. Cover a part of two leaves with these papers and secure them with paper clips Figure. Keep the plant in sunlight for 2–5 days. Observe the difference in the colour of the covered and the uncovered portions on the leaf. Perform iodine test on this leaf. Did the two parts show different results? Now take second leaf. Remove the strip and expose the covered part to the sunlight for 2–3 days and do the iodine test again. Describe your observations.
