The angular magnification of a simple microscope can be increased by increasing

If $P(A \cup B)=0.8$ and $P(A \cap B)=0.3$,then $P(\bar{A})+P(\bar{B})$ is equal to:

$A$ liquid does not wet the solid surface if the angle of contact is

Choose the correct option from the following:
$I$. Dehydration and dormancy of mature seed are crucial for seed storage.
$II$. Seed of $Lupinus \; arcticus$ is the oldest one which germinated after $2,000 \; years$.
$III$. Orchid seed is one of the largest seeds in the plant kingdom.
$IV$. Seeds of parasitic plants $Orobanche$ and $Striga$ are tiny seeds.

What type of life cycle in plants is indicated by the given figure?

In leaves of $C_4$ plants,malic acid synthesis during $CO_2$ fixation occurs in :-