Auxins were discovered by

Define parthenocarpy. Name the plant hormone used to induce parthenocarpy.

Auxin was isolated by ................ from tips of coleoptile of ....

Seedless fruits can be obtained by treating a plant with

Provide the full names of the following plant growth regulators:
$(1)$ $NAA$
$(2)$ $IPA$

Identify the functions of auxin and choose the correct option.
$I.$ Initiate rooting in stem cuttings
$II.$ Promote flowering in pineapples
$III.$ Controls xylem differentiation