Which of the following help in soil formation? Justify. [3 MARKS] (a) lichen (b) mosses (c) mango tree (d) cactus.
The climbing organs of plants like tendrils grow towards any support which they happen to touch and wind around the support. This is an example of :
(a) chemotropism
(b) nastic movement
(c) thigmotropism
(d) geotropism