The rate of respiration depends upon the

Carbon dioxide is liberated during:

Which of the following scientific papers would you assign to plant physiology?

If a cell contains more than one respiratory substrate,which respiratory substrate is used first?

In plants,respiration takes place

Respiration is an energy-releasing and enzymatically controlled catabolic process which involves a step-wise oxidative breakdown of organic substances inside living cells. In this statement about respiration,explain the meaning of $(a)$ Step-wise oxidative breakdown $(b)$ Organic substances (used as substrates).