Why do aquatic plants not have a well developed root system ?
(A) So that they can be pulled out easily.
(B) They don’t need long roots to absorb water.
(C) They do not need to absorb minerals.
(D) It keeps them afloat in water

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
Assertion (A): Sieve tube elements in phloem are living cells but lack nuclei at maturity.
Reason (R): Companion cells control the metabolic activities of sieve tube elements through occluding junctions, ensuring the continuous pressure gradient necessary for phloem loading and unloading of sugars.
In light of the above statements, choose the most appropriate answer from the options given below:

In plants, water is mainly transported through which tissue?

Given below are two statements, one is labelled as Assertion (A) and other is labelled as Reason (R).
Assertion (A): Transpiration helps in the ascent of sap.
Reason (R): Transpiration increases osmotic pressure in roots.
In light of the below given statements choose the most appropriate answer from the options.

A botanist observes a plant exhibiting rapid growth at its shoot tip. Which type of plant tissue is most likely responsible for this growth?

The nature of vascular bundle in dicot stem is generally

In coconut, the dispersal of fruit is due to

Topping in tobacco means:

Fibres of cotton are obtained from