Which plant has the smallest and lightest seeds?

Tegmen develops from

Given the list: $I -$ Castor,$II -$ Coconut,$III -$ Wheat,$IV -$ Rice,$V -$ Maize,$VI -$ Groundnut,$VII -$ Bean,$VIII -$ Pea. Categorize these into albuminous (endospermic) and ex-albuminous (non-endospermic) seeds.
Albuminous seeds $\quad\quad$ Ex-albuminous seeds

The edible part of the litchi fruit is:

Name the parts of the pistil which develop into fruit and seeds.

The gradual proliferation of the integumentary cells in the micropylar region of the castor seed induces the development of: