<b>P and Q are two types of plants having weak stems which cannot stand upright on their own. The plants P and Q have organs R and S respectively which can grow towards any support which they happen to touch and wind around that support. It is observed that organ R originates from the leaves of the plant whereas organ S originates directly from the stem of the plant.</b><b>(a) </b>What is (i) R, and (ii) S?<b>(b)</b> What is the name of growth movement exhibited by the organs R and S?<b>(c)</b> Name the stimulus involved in this case.<b>(d)</b> State whether the behaviour of organs R and S is a tropic movement or a nastic movement.<b>(e) </b>Name one plant like P and another plant like Q.