Question

(b) roots
(d) entire leaf surface
xx
4. Exchange of gases in plants takes place through the :
(a) stomata
(c) buds
5. Normal range of breathing rate in an average adult person at rest is :
(a) 9 to 12
(c) 12 to 20
(b) 15 to 18
(d) none of these
FILL IN THE BLANKS
1. All living organisms
to perform life processes.
External respiration is also known as
3. Trachea divides into two
4. Carbon dioxide turns lime water
5. During
the muscles present in between the ribs move the ribs upwards
and outwards, while the diaphragm pushes down and becomes flat.
WRITE "TY FOR TRUE AND 'F' FOR FALSE STATEMENTS
1. Respiration and hreathing
.​

Answer 1

Answer:

4. a. stomata

5. c. 12-20

Explanation:

Fill in the blanks:-

1. Respiration

2. Exhalation

3. Bronchi

4. to form white precipitate(calcium carbonate)

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