In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Q: Mutations in the APL gene cause defects in this tissue, and another type of cell in this tissue expresses WRKY27, which influences the NO response. The CONSTANS protein in Arabidopsis acts in this tissue in order to regulate flowering. In sections this tissue appears green under the fast-green stain, but it is more commonly viewed using . 05% aniline blue, which stains callose. This tissue is surrounded by Bast fibers, and these tissues sometimes operate by Robert Turgeon's polymer-trap mechanism. This tissue is responsible for some forms of translational repression by carrying fragmented tRNA, and the ribosomes and mitochondria for this tissue are primarily stored in its companion cells. Ernst Munch proposed the pressure-flow hypothesis for transport through this tissue, which consists of sieve tube elements. For 10 points, name this tissue that transports organic molecules and sugars in plants.
A:
Science