The diagram given alongside
shows a type of tropism. Study
the same and answer the
questions that follow :
(a) Name and define the type of
tropism shown in the diagram.
(b) Label the guidelines (1) to (4).
(c) Name two effective stimulants that
help in the growth of part (2).
(d) Name two groups of plants where part (2) grows towards gametophyte with the help of the stimulants mentioned in (c)