Differentiate between:
$(a)$ Integument and testa;
$(b)$ Perisperm and pericarp.
$(a)$
Integument | Testa |
It is the outermost covering of an ovule. It provides protection to it. | It is the outermost covering of a seed. |
$(b)$
Perisperm | Pericarp |
It is the residual nucellus which persists. It is present in some seeds such as beet and black pepper. | It is the ripened wall of a fruit, which develops from the wall of an ovary. |
Differentiate between microsporogenesis and megasporogenesis. Which type of cell division occurs during these events? Name the structures formed at the end of these two events.
Study the following statements and choose the correct option.
$I -$ Tapetum nourishes the developing pollen grains.
$II-$ Hilum represents the junction between ovule and funicle
$III-$ In aquatic plants such as water hyacinth and water lily, pollination is by water:
$IV-$ The primary endosperm nucleus is tripoid.
Delete odd one
Give differences : Microsporogenesis and Megasporogenesis
Give differences: Microsporangium and Megasporangium