Question

An organism A which cannot move from one place to another, makes a simple food B from the substances C and D available in the environment. This food is made in the presence of a green coloured substance E present in organs F in the presence of light energy in a process called G. Some of the simple food B also gets converted into a complex food H for storage purposes. The food H gives a blue-black colour with dilute iodine solution.

1. What are (i) organism A, (ii) food B, and (iii) food H?
2. What are C and D?
3. Name (i) green coloured substance E, and (ii) organ F.
4. What is the process G?

Answer 1

(a)

1. Organism A: Green plant (an autotroph that cannot move from place to place).
2. Food B: Glucose (the simple sugar/carbohydrate synthesized during photosynthesis).
3. Food B: Glucose (the simple sugar/carbohydrate synthesized during photosynthesis).

(b) Substances C and D are carbon dioxide CO₂ and water (H₂O. These are the basic inorganic raw materials taken from the environment.

(c) 

1. Green substance E: Chlorophyll (the pigment responsible for trapping light energy).
2. Organ F: Leaf (specifically within the chloroplasts of the leaf cells where the food-making process occurs).

(d) The process G is photosynthesis.