Presence of an impermeable coating around fruits and seeds and small or large air cavities is a characteristic feature of:

Micropyle in seed helps in the entry of $:-$

$A$ collar-like outgrowth arising from the base of the ovule and forming a sort of third integument is known as:

The megasporangium transforms into a/an ...... .

How many years old is the viable seed of date palm $(Phoenix dactylifera)$ discovered during the archaeological excavation at King Herod's palace near the Dead Sea?

Explain the structure of a fruit and provide information about its types.