Question # 1

A cubic millimeter of blood contain about ............. million RBCs.

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5

10

15

20

Which ions are involved in opening and closing of stomata?

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Potassium ions

Chloride ions

Sodium ions

Iodide ions

Which of the following tissue layer us found in all blood vessels?

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Smooth muscle

Endothelium

Skeletal muscle

Connective tissue

The death of the heart tissue is called:

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Arterioclerosis

Atherosclerosis

Myocardial infarction

Thalassemia

Which of the following tissue layer is found in all blood vessels?

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Smooth muscle

Endothelium

Skeletal muscle

Connective tissue

When stomatal opening reduce in sixe, the rate of transpiration ............... .

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Transpiration

Transcription

Translation

Allof above

In the embryonic and foetal life RBCs are produced in:

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Liver

Ribs

Spleen

Liver and spleen

According to pressure flow mechanism which is the actual force behind the movement of food in phloem?

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Drop in the pressure at the sink end

Gain of water at the sink end

Osmotic pressure

All of these

Plants form beneficial relationships with soil bacteria fungi in order to:

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Avoid diseases

Absorption of minerals

Transpire more water

All of these

When fibrinogen makes blood clot, it separates from blood and the remainder is called:

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Plasma

Lymph

Serum

Puss

PH of human blood is ......................... .

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7.1

7.2

7.3

7.4

Rhesus factor was first identified in Rhesus .............. .

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Dog

Monkey

Cat

Gorilla

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

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6-7

7-8

5-6

8-9

Which of the following proteins is not present in the plasma of the blood?

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Immunoglobulin or antibodies

Prothrombin

Haemoglobin

Fibrenogen

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