Seed germination requires:
$I$. Light
$II$. Suitable temperature
$III$. Moisture
$IV$. Oxygen
Select the correct option.

Analogy type question:
$(1)$ Initial growth : Lag phase :: Rapid growth : .........
$(2)$ $IAA$ : Indole compounds :: Abscisic acid : .......

Which of the following is a plant hormone?

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

One hormone hastens the maturity period in juvenile conifers,a second hormone controls xylem differentiation,while the third increases the tolerance of plants to various stresses. They are respectively:

Coiling of garden pea tendrils around any support is an example of