Question # 1

Leukemia is a disease in which leucocytes increase ...................... .

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Normally

Abnormally

Both

None

Stomata close when the guard cells:

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Lose water

Gain chloride ions

Become turgid

Gain potassium ions

Which ions are involved in opening and closing of stomata?

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Potassium ions

Chloride ions

Sodium ions

Iodide ions

When do the atria contract?

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Before diastole

After systole

During diastole

During systole

Which of the following is a type of leukocyte?

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Macrophage

Eosinophil

Monocyte

All of the above

Which of the following contains deoxygenated blood in an adult human?

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Left atrium

Pulmonary artery

Pulmonary vein

All of the above

Which of the following structures are not cells.

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Lymophocytes

Eosinophils

Monocytes

Platelets

Normal rate of heart beat in a healthy human being is ......... beats per minute.

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72

73

70

75

The normal pH of human blood is:

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6.4

7.4

8.4

9.4

The grater the no. of stomata on leaf , the ............. would be transpiration.

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Higher

Lower

Remain constant

None

The death of the heart tissue is called:

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Arterioclerosis

Atherosclerosis

Myocardial infarction

Thalassemia

The percentage of inorganic salts and in the plasma is:

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0.6

0.7

0.8

0.9

Platelets life span in about ........... days.

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6-7

7-8

5-6

8-9

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Biology 9th Class English Medium Chapter 9 Online Test MCQs With Answers

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