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

The percentage of inorganic salts and in the plasma is:

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0.6

0.7

0.8

0.9

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

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Higher

Lower

Remain constant

None

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

Plasma contains .................. % water.

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10%

7%

90%

2%

In most plants the food is transported in the form of:

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Glucose

Sucrose

Starch

Proteins

Which of the following cells is most abundant in the blood?A

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Red blood cells

White blood cells

Platelets

None of 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

The rate of transpiration is increased when:

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Low light

Temperature decrease

Humidity increased

None of these

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

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Two

Three

Four

Five

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

Which of the followings is area of supply of blood in plants?

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Leaf

Stem

Fruit

All

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

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Smooth muscle

Endothelium

Skeletal muscle

Connective tissue

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