The answer is D. quaternary
<span>New tree species discovered with cone-like features and have seeds as its covering are called pine trees. These pine trees have pine cones which is their reproductive structure. These pine cones are seeds exposed outside the trees. The pine cones belong to the plant group called gymnosperms.</span>
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Solar panels fight global warming by producing electricity that keeps us from burning greenhouse gas-producing fossil fuels. They also shade Earth from the sun.
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Monocots have bundles of xylem and phloem mixed throughout their stem with vascular cambium between, an arrangement found on many herbaceous plants. Dicots, like trees and many woody stems, organize their parts in rings. A cork cambium, the growth layer, is found between the xylem and phloem in the ring
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