On touching the leaves of $Mimosa \text{ } pudica$ droop down because of:

Fill in the blanks with appropriate word/words.
$(a)$ $A$ phase of growth which is maximum and fastest is $.......$ .
$(b)$ Apical dominance as expressed in dicotyledonous plants is due to the presence of more $.......$ in the apical bud than in the lateral ones.
$(c)$ In addition to auxin,a $.........$ must be supplied to culture medium to obtain a good callus in plant tissue culture.
$(d)$ $.........$ of a vegetative plants are the sites of photoperiodic perception.

Identify the partial parasite and total parasite plants,respectively,from the following.

Identify the incorrect statement/s.
$I$. Kinetin is a derivative of adenine which is a pyrimidine.
$II$. The technique of decapitation is widely used in tea plantations.
$III$. Ethylene is a gaseous plant hormone.
$IV$. Use of $GA$ hastens the malting process in brewing industry.
$V$. $ABA$ is a growth promoter.

Plants are killed in winter by frost because:

$A$ clinostat is an instrument used in experiments related to: