Question

Que 1. What is the reaction of a living organism to a stimulus called?
1ue 2. What is the opening and closing of guard cells regulating the water level in leaves called?
Que 3. What is meant by excretion? Name two products excreted by trees.
Que 4. What is the difference between a plant and an animal cell?
Que 5. Why are green plants called airstrips?
Que 6. Describe breathing. In what way is the exhaled air different from the inhaled air?
Que 7. What are the common features found in mountain animals?

Answer 1

7. they have thick hair cover , survive at low temperature ,