What percentage of oxygen is contained in exhaled air?
What percentage of oxygen is contained in exhaled air?
21%
16%
4%
0.04%
Less than 0.01%
Correct answer is B
No explanation has been provided for this answer.
An individual in the AB blood group is a universal recipient for blood donation because ...
The richest source of vitamin A are ...
Trees in Savanna habitats usually have thick bark which mainly ...
Predators are beneficial in pest control because they ...
Which of the following is an aboreal organism? ...
Fern plants carry out Photosynthesis in the ...
The only caste in the termite colony that can feed themselves are the ...
The pallisade cells are the structures labelled ...
Plants which can survive in places where the water supply is limited are ...