PLANTS
CLASSIFICATION OF PLANTS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They never lose their leaves so the are always green
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They lose their leaves in the autumn but never change their color
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They have leaves during all the year, even though they can lose some
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They are all green because they have chlorophyll in the roots
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Detailed explanation-1: -Most gymnosperms are evergreen, but some, such as larch and bald cypress, are deciduous (the leaves fall after one growing season). The leaves of many gymnosperms have a thick cuticle and stomata below the leaf surface.
Detailed explanation-2: -Gymnosperms are known as evergreen plants because they do not shed their leaves. They shed only those leaves which are old and least productive. Leaves of gymnosperm remains with the plant for three to five years before they shed their leaves. Therefore they are evergreen.
Detailed explanation-3: -Gymnosperms include most evergreen species such as pines, spruces and firs. Some gymnosperms, including larch and ginkgo, do lose their leaves in the winter.
Detailed explanation-4: -Gymnosperms possess needles or scale-like leaves, sometimes flat and large, and evergreen! No vessel elements are found in xylem, so out-competed now by vesseled angiosperms except in certain situations. Gymnosperms exhibit cones or strobili, naked seeds (= “gymnosperm"), but not flowers.
Detailed explanation-5: -At maturity, a gymnosperm embryo has two or more seed leaves, known as cotyledons. Cycads, Ginkgo, and gnetophytes have two cotyledons in the embryo; pine and other conifers may have several (eight is common; some have as many as 18).