Question

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3. Give reason for the following:
(a) Arteries are thick walled blood vessels.
(b) Veins are thin walled blood vessels.
(c) Veins have valves in them.
LONG ANSWER TYPE QUESTIONS (5 Marks)
1. If you ch&w chapatty for long, after some time it taste sweet ? Why is this so 2
2. What&s the benefit of residual volume of air in the respiratory process
3. Why is the energy needs in plants is very less as compared to animals ? Explain.
4. Dilaw a well-labelled diagram of Nephron. Explain the process of formation of urix
the human kidney
5. Draw a diagram showing Human Respiratory System. Label the following parts:
(à Alveolus
(b) Trachea
Branchus TI AT A ao apgs D.
Hints to Loo AnswerType Questions
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Chanati will/taste sweet as saliva breaks down starch which is a complex mol​

Answer 1

long answer 1.bcz of gluten protein. 3.bcz animals needs to run talk walk.