21. Which of the following is true of ground tissues? A. They serve as sites for photosynthesis, provides a support matrix for vascular tissue, and
helps store water and sugars.
B. They are composed of parenchyma, collenchyma, and sclerenchyma cells.
C. They form the cortex and the pith in roots.
D. All of the above.

i would have a lunch. it's one big package of food, making it one food. : p

is it multiple choice?

reflection is the bouncing back of a propagating wave when it encounters a barrier; usually shows an image of the source of light wave

1) bounces back from an opaque material

2) bounces back from the boundary

3) seen in mirrors

refraction is the bending of a propagating wave having a shift of direction as it passes through different media; usually seen in lenses to magnify or lessen

1) passes through a prism

2) moves from one medium to another

3) seen in lenses

translocation                                                                                         b                                     b   is the answerr