Name the conducting structures present in plants.

Describe the exchange of gases which takes place in the leaves of a plant:

1. During daytime.
2. At night.

Classify the following into herbivores, carnivores and omnivores:
Lion, Man, Dog, Goat, Crow, Elephant, Snake, Hawk, Rabbit, Deer.

Mention the major events during photosynthesis.

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 is (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?

Draw a diagram of the human heart and label its parts.

Each and every respiration organ is structurally specialised in its function. Justify with examples.

What are the various components of blood? State their functions.

Draw a labelled diagram of:

1. A xylem vessel.
2. A sieve tube (or phloem).

1. A gas is released during photosynthesis. Name the gas and also state the way by which the gas is evolved.
2. What are stomata? What governs the opening and closing of stomata?