Plants which behave as mesophytes in rainy season and as xerophytes in summers are called:

$I.$ The increased growth per unit time is termed as $A$.
$II.$ Abscisic acid $B$ the stomata.
Choose the correct option and fill in the blanks.

An annual plant differs from a biennial plant by ..........

Which of the following are plant growth promoters?

Match List-$I$ with List-$II$:

List-$I$ (Growth Regulator)	List-$II$ (Function/Effect)
$A$. $2,4-D$	$I$. Brewing industry
$B$. $GA_3$	$II$. Stimulation of stomatal closure
$C$. Kinetin	$III$. Herbicide
$D$. $ABA$	$IV$. Nutrient mobilisation

Choose the correct answer from the options given below:

Name a hormone which:
$(A)$ is gaseous in nature
$(B)$ is responsible for phototropism
$(C)$ induces femaleness in flowers of cucumber
$(D)$ is used for killing weeds (dicots)
$(E)$ induces flowering in long day plants