Solved MCQs of Biology Class 9
The rate of transpiration is increased when:
Low light
Temperature decrease
Humidity increased
None of these
There is separation of oxygenated and deoxygenated blood in birds and mammals because:
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 fibrinogen makes blood clot,it separates from blood and the remainder is called:
Plasma
Lymph
Serum
Puss
Pulmonary veins originate from ………….. .
Liver
Lungs
Kidney
Intestine
One complete cardiac cycle takes ……… second .
0.2 sec
0.5 sec
0.8 sec
0.9 sec
The normal pH of human blood is:
6.4
7.4
8.4
9.4
…………. is the movement of molecule from a region of higher concentration to a region of lower concentration.
Osmosis
Diffusion
Both
None
Arteries can be divided into ……….. types.
Two
Three
Four
Five
Which of the following is a function of human blood?
It regulates body temperature
It transports wastes
It provides defence
All of the above
The percentage of plasma protein in the blood is:
4 – 5
5-6
7-8
7-9
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