Question

1. Choose the correct answers.
1. In plants, air enters through
(a) stomata
(b) lungs
2. During inhalation, the diaphragm moves
a ) up b ) down c) up and down d) remains constant
3.we get cramps after very heavy physical activity due to accumulation of
a) carbon dioxide b) lactic acid c) water d) none of these

4. Upon exhaling air into lime water, it turns milky due to
(a) oxygen
(b) water vapour
(c) carbon dioxide
(d) none of these
5. Breathing rate per minute in humans under normal conditions is
(a) 16-18 times (b) 20-25 times (c) 30-32 times
(d) 15-20 times
​

Answer 1

Answer:

1. Stomata
2. down
3. lactic acid
4. carbon dioxide
5. 16-18 times.

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Answer 2

Answer:

stomata

up and down

lactic acid

carbon dioxide

16-18 times

Explanation:

i think this is right im not sure tho. hope this helps!