Which statements describe vascular tissue? Check all that apply. The primary purpose of vascular tissue is to support the plant and help it stand upright. Phloem carries food made during photosynthesis to other parts of the plant. Phloem contains the chloroplasts. Xylem moves water and nutrients throughout the plant. Xylem is the protective, waxy layer on a plant that prevents water loss.

What reaction is taking place? 02 + c3h8 = h20 + co2

The allotropes of carbon include a variety of structures that include three-dimensional tetrahedral lattices, planes of hexagonal rings, cylindrical tubes of hexagonal rings, and spheres of five- and six-membered rings. similar shapes of network covalent atomic solids are possible with carbon nitride, boron, and pure silicon (e.g., silicene is a graphene-like allotrope of pure silicon). in contrast, silicates exist as either highly ordered or amorphous (more random) three-dimensional lattices. what could explain why there are there no naturally occurring sheets, stacked sheets, cylindrical tubes, or spheres of network covalent atomic solids composed of silicon and oxygen (sio2)? would pure silicate structures make good lubricants or good electrical conductors?

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