Each day human body breathe in ___ litres of air.
A. 5,000 to 10,000
B. 10,000 to 15,000
C. 15,000 to 20,000
D. 20,000 to 25,000
The removal of carbon dioxide, urine and sweat is a process of which of the following?
A. Digestion
B. Respiration
C. Excretion
D. Circulation
A true column of chromosomes number in garden – pea, onion, and tobacco is:
Garden pea Onion Tobacco
A. 13 15 47
B. 14 16 48
C. 15 17 49
D. 16 18 50