Q-3 Answer the following questions in brief: (any-4) [8] (1) What is parasitic mode of nutrition? Explain with example. (2) Under what conditions does patient need to be on a drip of glucose? (3) Distinguish between : Conductors – Insulators (4) Write about milk teeth & permanent teeth. (5) Why does a vegetable stain turn reddish – brown when washed with soap solution? (6) Give the expanded form of ORS. & Why ORS is recommended for a person suffering from Diarrhoea.
Answers
The process by which green plants make their own food (like glucose)
from carbon dioxide and water by using sunlight in the presence of
chlorophyll is called photosynthesis.
2. The leaves contain tiny, green coloured bodies called chloroplasts which
contain a green pigment called chlorophyll, so, they are green in colour.
3. Non-green plants which obtain their nutrients from dead and decaying
organic matter of plants and animals are called saprophytes.
4. Nutrition is the process of taking food by an organism and its digestion,
absorption and utilisation by the body.
5. The mode of nutrition in which an organism cannot make its own food
from the simple substances but obtains ready-made food made by green
plants directly or indirectly is called heterotrophic mode of nutrition.