A cactus is an example of

(A) hydrophyte
(B) saprophyte
(C) xerophyte
(D) pteridophyte

The answer is: (C) xerophyte
A cactus is an example of xerophyte, capable of withstanding extended periods of dry conditions as they have deep-spreading roots and capacity to store water.

Plant growth depends on

(A) cell division
(B) harmones
(C) cell enlargement
(D) all of above

The answer is: (D) all of above