Question # 1

When do the atria contract?

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Before diastole

After systole

During diastole

During systole

ABO blood group system was discovered by:

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T.H Morgan

Hans krebs

Winhelm kuhne

Karl landsteiner

............. is the movement of molecule from a region of higher concentration to a region of lower concentration.

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Osmosis

Diffusion

Both

None

The percentage of inorganic salts and in the plasma is:

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0.6

0.7

0.8

0.9

In experiments to show transpiration from lead surfaces cobalt chloride paper changes its colour from:

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Pink to blue

Blue to pink

Pink to colourless

Colourless to pink

Which ions are involved in opening and closing of stomata?

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Potassium ions

Chloride ions

Sodium ions

Iodide ions

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

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

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Two

Three

Four

Five

Green leaves in which glucose is prepared called .......... .

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Source of assimilates

Sink of assimilates

Both

None

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

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5

10

15

20

Which of the following blood vessels have oxygenated blood?

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Pulmonary artery

Pulmonary vein

Superior vena cave

Inferior vena cave

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

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Camillo

Karl land Steiner

Robert Hooke

Mathias Schleiden

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

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Glucose

Sucrose

Starch

Proteins

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Biology 9th Class English Medium Chapter 9 Online Test MCQs With Answers

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