Approximately how tall is the inflorescence of the Century plant (Agave)?

Which of the following pairs of families possess pollinia?

Given below are two statements: One is labelled as Assertion $(A)$ and the other is labelled as Reason $(R)$.
Assertion $(A)$: Both wind and water pollinated flowers are not very colourful and do not produce nectar.
Reason $(R)$: The flowers produce an enormous amount of pollen grains in wind and water pollinated flowers.
In the light of the above statements,choose the correct answer from the options given below:

Give differences: Microsporogenesis and Megasporogenesis.

Thymus possesses two types of plants,female flowered and hermaphrodite flowered. The condition is called

Name the plants which exhibit unusual flowering phenomena.