Respiration occurs in .........

Which among the following is the most appropriate reason for storing green-coloured apples at low temperature (refrigerator)?

Explain the history of respiration.

Given below are two statements.
Statement $I$ - During respiration the respiratory substrate directly unite with oxygen.
Statement $II$ - The primary process of respiration consists of removal of hydrogen from the respiratory substrate.
In the light of above statements,Select the correct option given below:

Respiration occurs in .........

Match the respiration types with their respective respiratory substrates:

Respiration	Type of substrate
$A$. Floating respiration	$i$. Proteins
$B$. Cytoplasmic respiration	$ii$. Starch
$C$. Protoplasmic respiration	$iii$. Carbohydrates
$D$. Lactic acid fermentation	$iv$. Lactose

Select the correct matching sequence: