Question # 1

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

Which of the followings in not true about the opening and Closing of Stomata?

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Light helps in the opening and closing of stomata

K⁺ ions are responsible for the opening and closing of stomata

The osmosis of water is responsible for the opening and closing of stomata

None for these

A patient with blood group A can be given the blood of donor who has:

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Blood group A or AB

Blood group A or O

Blood Group A only

Blood group O only

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

ABO blood group system was discovered by:

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T.H Morgan

Hans krebs

Winhelm kuhne

Karl landsteiner

Which of the following is a type of leukocyte?

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Macrophage

Eosinophil

Monocyte

All of the above

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

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One

Two

Three

fOUR

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

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

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Smooth muscle

Endothelium

Skeletal muscle

Connective tissue

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

When do the atria contract?

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Before diastole

After systole

During diastole

During systole

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

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5

10

15

20

Arteries can be divided into ........... types.

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Two

Three

Four

Five

Capillaries are ............ micrometer in diameter.

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7-8 micrometer

8-10 micrometer

8-14 micrometer

7-10 micrometer

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