( ( ( The ( light ( sensitive structures ) ) ) ( in ( the retina ) ) ) ( ( are ( ( called ( ( rods and ) cones ) ) ( from ( their ( microscopic appearance ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ light) (JJ sensitive) (NNS structures)) (PP (IN in) (NP (DT the) (NN retina)))) (VP (VBP are) (VP (VBN called) (NP (NNS rods) (CC and) (NNS cones)) (PP (IN from) (NP (PRP$ their) (JJ microscopic) (NN appearance))))) (. .)))
The light sensitive structures in the retina are called rods and cones from their microscopic appearance.
(ROOT (S (NP (NP (DT The) (JJ light-sensing) (NNS cells)) (PP (IN in) (NP (DT the) (NN retina)))) (VP (VBP are) (VP (VBN called) (NP (NNS rods) (CC and) (NNS cones)))) (. .)))