The hilum is a scar on the

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 $2000 \;year$.
$III$. Orchid seed is one of largest seed in plant Kingdom.
$IV$. Seeds of parasitic plants Orobanche and Striga are tiny seeds.

Seed germination requires

$I$. Light $II$. Temp (suitable)

$III$. Moisture $IV$. Oxygen

Select correct option

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

While eating watermelons, all of us wish it was seedless. As a plant physiologist can you suggest any method by which this can be achieved.