Which of the following is not a monocot?

The division of the plant kingdom that provides the dominant terrestrial flora of the present day is:

Angiosperms are divided into how many classes?

Assertion $(A)$: Hibiscus is called an angiosperm.
Reason $(R)$: In Hibiscus,the ovules are enclosed and covered by the ovary.

Angiosperms differ from gymnosperms in having

Which element of xylem is the characteristic feature of angiosperms?