Question # 1

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

Choose an answer

Liver

Lungs

Kidney

Intestine

Exchange of materials between blood and surrounding tissues occurs in:

Choose an answer

Arteries

Veins

Capillaries

All of these

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

Choose an answer

0.2 sec

0.5 sec

0.8 sec

0.9 sec

Which of the following chambers has the thickest walls in human heart?

Choose an answer

Right atrium

Left atrium

Left ventricle

Right ventricle

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

Choose an answer

Glucose

Sucrose

Starch

Proteins

Which of the following contains deoxygenated blood in an adult human?

Choose an answer

Left atrium

Pulmonary artery

Pulmonary vein

All of the above

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

Choose an answer

Pink to blue

Blue to pink

Pink to colourless

Colourless to pink

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

Choose an answer

6-7

7-8

5-6

8-9

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

Choose an answer

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

The normal pH of human blood is:

Choose an answer

6.4

7.4

8.4

9.4

When fibrinogen makes blood clot, it separates from blood and the remainder is called:

Choose an answer

Plasma

Lymph

Serum

Puss

Which of these are responsible for blood clotting?

Choose an answer

Platelets

Erythrocytes

Neutrophils

Baseophils

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

Choose an answer

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

More Classes

Other Links

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

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer