The steps of respiration are controlled by $......$.

Plants require water for their survival. But when watered excessively,plants die. Discuss.

Give scientific reasons:
$(1)$ The actual process of respiration occurs in the protoplasm and mitochondria of the cell.
$(2)$ The rate of respiration is slow in plants.

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:

Respiration is a

$CO_2$ is released during which of the following processes?