Among the following respiratory substrates,which one is the main source of energy?

The process of breaking down complex molecules within cells through the oxidation of $C-C$ bonds,which releases a significant amount of energy,is known as $.......$.

Respiration is a ......... process.

What is respiration? Explain about respiratory substrates.

The rate of respiration of young maturing seeds is quite high,but as water content decreases during further maturation,respiration:

Which of the following reasons explain why plants do not have specialized respiratory organs?
$I-$ Each plant part takes care of its own gas exchange needs.
$II-$ There is very little transport of gases from one plant part to another.
$III-$ The rate of respiration in plants is much slower compared to animals.
$IV-$ Plants have a higher requirement for gas exchange.
$V-$ During photosynthesis,the plant's requirement for oxygen from the atmosphere increases.
$VI-$ In large,dense plants,gases can diffuse over long distances.
$VII-$ In plants,each living cell is located very close to the plant surface.