Question # 1

Most of the gaseous exchange in a leaf occurs through:

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Stomata

General surface

Cuticle

Lenticels

Percentage of CO₂ in exhaled are during breathing is:

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16%

4%

79%

0.04%

The primary chemical stimulus for breathing is the concentration of.

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Carbon dioxide in blood.

Oxygen in blood

Carbon oxide in muscles

Oxygen in muscles.

The length of trachia is __________ cm approximately:

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10

12

14

16

The inflamation of bronchi or bronchioles is caled:

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Bronchites

Emphysema

Pneumonia

Chest box

Glottis is a narrow opening at the floor of:

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Nasal cavity

Nostril

Pharynx

Antibiotics

How many bronchi are there in the air passageway?

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One

Two

Many

None of these

In first stem of glycolysis glucose molecules breaks ans divide into two _______ molecules

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Citric acid

Lactic acid

Pyruvic acid

Formic acid

Stomata are present in:

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Phloem

Xylem

Endodermis

Epidermis

Gaseous Exchange in cow takes in:

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Bronchi

Tranchea

Pharynx

Alveoli

For gaseous exchange the leaf and young stems have in their epidermis:

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Stomata

Lenticels

Companion cell

Guard cells

The rate of breathing during exercise or other hard:= physical work is:

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10-20 times

20-30 times

30-40 times

40-50 times

It is also called sound box:

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trachea

larynx

pharynx

bronchus

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