<span>Green plants are green because they contain a pigment called chlorophyll. Chlorophyll absorbs certain wavelengths of light within the visible light spectrum. ... Plants are able to satisfy their energy requirements by absorbing light from the blue and red parts of the spectrum.
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To design an experiment, you must set all other variables constant. These may include the environment, soil type, plant/flower type, water treatment and other essential variables. The only parameter you should vary is the soil temperature.
<span>The answers are -seed-bearing and -vascular. The gymnosperms are a group of seed-bearing vascular plants. The name "gymnosperm" is derived from Greek words meaning "naked seeds" because their seeds do not develop within an ovary but on the surface of scales. The gymnosperms, as other vascular plants, have vascular tissue specialised to transport fluids. This group of plants includes conifers, Ginkgo, cycads, and gnetophytes. </span>
C. red blood cells, that is how we get oxygen into our bodies