Question # 1

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

Which ions are involved in opening and closing of stomata?

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Potassium ions

Chloride ions

Sodium ions

Iodide ions

The rate of transpiration is increased when:

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Low light

Temperature decrease

Humidity increased

None of these

................ is the first organ which comes out of seed.

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Stem

Root

Leaf

All

Stomata close when the guard cells;

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Lose water

Gain chloride ions

Became turgid

Gain potassium ions

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

When do the atria contract?

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Before diastole

After systole

During diastole

During systole

The percentage of inorganic salts and in the plasma is:

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0.6

0.7

0.8

0.9

In the embryonic and foetal life RBCs are produced in:

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Liver

Ribs

Spleen

Liver and spleen

The normal pH of human blood is:

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6.4

7.4

8.4

9.4

Pulmonary veins originate from .............. .

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Liver

Lungs

Kidney

Intestine

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