1.

The growth of a pollen tube towards the ovule caused by a sugary substance as a stimulus in an example of : (a) phototropism (b) chlorotropism (c) gravitropism (d) chemotropism

Answer»

The growth of a pollen tube towards the ovule caused by a sugary substance as a stimulus in an example of :

(a) phototropism

(b) chlorotropism

(c) gravitropism

(d) chemotropism



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