MCQS of Biology 1st Year
The normally human blood absorbs the amount of oxygen at sea level is about
02 ml/100 ml of blood
200 ml/100 ml of blood
20 ml/100 ml of blood
19.6 ml/100 ml of blood
The heart of the fist is single circuit and the blood flows in
Reverse direction
One direction
Two direction
One and two direction
Air spaces between mesophyll cells of a leaf comprise ______ of the total volume
30%
20%
40%
50%
The main tracheal trunk in cockroach communicates with exterior by
100 pairs
4 pairs
8 pairs
10 pairs
Water is dense than air
800 times
1800 times
80,000 times
8000 times
Heart burn is a painful sensation in the
Chest cavity
Pharynx
Small intestine
Stomach
Xylem and phloem are not involved
In transport of minerals
In transport of liquids
In transport of water
In transport of gases
1 2
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