The entry of oxygen and water into the seed during germination is facilitated by . . . . . . .

In black pepper and beet, a part of the nucellus remains unused. What is this persistent nucellus called?

$S$ - Statement: The embryo from the seed of an orchid is extracted and grown in a culture medium.
$R$ - Reason: The seeds of some plants like orchids do not contain stored food.

In which seeds are remnants of the nucellus persistent? This residual persistent nucellus is known as the perisperm.

$A$: Nucellus remains persistent in the seeds of black pepper.
$R$: It is a haploid parenchymatous tissue.

In groundnut, the source of oil is found in: