The maximum amount of water vapour that the atmosphere can hold at a given temperature is known as:

Match List-$I$ with List-$II$.

List-$I$	List-$II$
$A$. Emphysema	$I$. Rapid spasms in muscle due to low $Ca^{++}$ in body fluid
$B$. Angina Pectoris	$II$. Damaged alveolar walls and decreased respiratory surface
$C$. Glomerulonephritis	$III$. Acute chest pain when not enough oxygen is reaching to heart muscle
$D$. Tetany	$IV$. Inflammation of glomeruli of kidney

Choose the correct answer from the options given below:

Given below are two statements.
Statement $I$: Guard cells of stomata are kidney shaped in dicotyledons and dumbbell shaped in monocotyledons.
Statement $II$: In $Cyperus$,both kidney and dumbbell shaped guard cells are present.
In the light of above statements,choose the most appropriate answer from the options given below:

Which of the following steps is $NOT$ involved in the process of respiration?

Analogy type question:
$(1)$ Inspiratory Reserve Volume $(IRV)$: $2500$ to $3000 \ mL$ :: Inspiratory Capacity $(IC = TV + IRV)$: ........
$(2)$ $CO_2$ by hemoglobin: Carbamino-hemoglobin form :: Oxygen binds with hemoglobin: ........

Which of the following plants is able to show rolling of leaf during the middle of the day?