4. The zone at the bottom of the sea is __________ A: Ramet B: Epiphytes C: Benthic D: Rhizome

Which of the following in the picture has the phenomenon of the head turning movement?[img=933x741]1803b813a1f8181.jpg[/img] A: The twine growth motion of the stem is a typical head-turning movement B: The rhizome growth of bamboos is called horizontal geotropic growth. C: The opening and closing of the leaflets of Mimosa is called the seismonasty. D: The opening and closing of flowers of tulips is temperature sensitivity.