Raphides are needle-like crystals made up of

Extreme xerophytic condition is shown by

Identify $X$ in the given figure.

Which of the following species is used to obtain both edible oil and fibers?

Given below are two statements.
Statement-$I$: The arrangement of ovules within the ovary is known as placentation.
Statement-$II$: If a fruit is formed by fertilization of the ovary,it is called a parthenocarpic fruit.
Choose the correct answer from the options given below.

What is the approximate height reached by the Eucalyptus tree?