Question # 1

Which of the following blood vessels have oxygenated blood?

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Pulmonary artery

Pulmonary vein

Superior vena cave

Inferior vena cave

One complete cardiac cycle takes ......... second .

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0.2 sec

0.5 sec

0.8 sec

0.9 sec

Blood is composed of ................. parts.

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One

Two

Three

fOUR

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

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6-7

7-8

5-6

8-9

Stomata close when the guard cells;

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Lose water

Gain chloride ions

Became turgid

Gain potassium ions

Which of these statements is correct about the circulatory system?

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It transports hormones

Capillaries have thicker walls than veins

Systemic circulation carries blood to and from the lunges

All of the above are true

There is separation of oxygenated and deoxygenated blood in birds and mammals because:

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The ventricles are completely divided

The ventral aorta is divided into aortic and pulmonary trunk.

The aortic arch is divided into two systemic arches.

None of the above

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

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5

10

15

20

Heart consists of ............ chambers.

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Two

Three

Four

Five

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

ABO blood group system was discovered in 1901 by .................. .

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Camillo

Karl land Steiner

Robert Hooke

Mathias Schleiden

Which of the following is a function of human blood?

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It regulates body temperature

It transports wastes

It provides defence

All of the above

Trace the pathway of water from the soil through the plant to be the atmosphere:

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Endodermis, cortex , epidermis , xylem , intercellular spaces in mesophyll, stomata

Epidermis, endodermis , phloem, cortex of leaf, intercellular spaces of mesophyll, stomatta

Root hairs, epidermis , Cortex, xylem, endodermis, intercellular spaces in mesophyll, stomata

Root hairs, Cortex, endodermis ,xylem,intercellular spaces in mesophyll, stomata

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