During respiration,the exchange of gases takes place in:

During deficiency of oxygen in tissues of human beings,pyruvic acid is converted into lactic acid in the

In which part of the alimentary canal is food finally digested?

Name the components of blood which transport:
$(i)$ Food,carbon dioxide and nitrogenous wastes
$(ii)$ Oxygen

Represent the equation of photosynthesis. Explain the steps involved in photosynthesis. In which way are the steps of photosynthesis different in desert plants?

How do desert plants perform the photosynthesis process even though their stomata remain closed during the daytime?