PRESENTATION OUTLINE
the growth or turning of plant roots toward or away from moisture.
is a turning or growth movement by a plant or fungus in response to gravity. It is a general feature of all higher and many lower plants as well as other organisms.
the turning or bending of a plant or other organism in response to a touch stimulus.
the orientation of a plant or other organism in response to light, either toward the source of light ( positive phototropism ) or away from it ( negative phototropism ).
a tropism, especially of a plant, in response to a particular substance.
