Biology
Which of the following may cause the breakdown of pyruvate into lactic acid in our muscles?

Lack of Oxygen
Lack of carbon dioxide
Lack of water
Lack of nitrogen

ANSWER DOWNLOAD EXAMIANS APP

Biology
Plants are killed in winter by frost

because no photosynthesis takes place at such low temperature
because there is no transpiration
because of desiccation and mechanical damage to the tissues
because respiration ceases at such low temperature

ANSWER DOWNLOAD EXAMIANS APP

Biology
Function of pace maker is

To start the process of respiration
To initiate heart beat
To regulate the formation of urine
To regulate the process of digestion

ANSWER DOWNLOAD EXAMIANS APP