One of the following is not  produced during the anaerobic respiration in yeast.  This is one is 

The normal range of 'breathing rate' per minute of an average adult person at rest is 

During heavy exercise, we get cramps in the legs due to the accumulation of 

The animal which can breathe through the lungs as well as through skin is 

Which of the following are not the products of anarobic respiration in muscles? 

a. Carbondioxide

b. Energy

c. Alcohol

d. Lactic acid

Which of the following is not likely to have a much higher breathing rate? 

Which of the following is not part of the human respiratory system? 

As compared to inhaled air, the exhaled air contains more of 

a. Water vapour

b. Oxygen

c. Carbondioxide

d. Nitrogen 

One of the following does not have gills for breathing. This one is 

The process which involves the exchange of gases is called