問題一覧
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vast clusters of sieve pores.
seive areas
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shorter and have wider ends.
seive tube members
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Is the outermost layer of the plant.
epidermis
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which is a stack of sieve tube members. And found in Angiospersm and more advanced.
seive tube
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Are living cells with no nuclei and other membrane-bound organelles.
Sieve elements
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Are parenchyma cells that are associated with sieve tube elements
companion cells
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An inner cell (or a small number of them) of the cork cambium may also differentiate into a layer of living parenchyma cells.
phelloderm
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Are long, thin cells with tapered ends that are connected by pits.
Tracheids
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These living cells are the sieve elements, companion cells, and parenchyma cells.
Phloem
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These are tubular extensions of individual epidermal cells, occur in a zone just behind the tips of young, growing roots.
root hairs
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Is the ground tissue surrounded by the vascular tissues.
Pith
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Considered to be complex permanent tissues.
Vascular tissues
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Is the one found outside the vascular tissues.Is the one found outside the vascular tissues.
Cortex
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Are groups of cells that contain large vacuoles and have thin cell walls.
bulliform cells
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elongated and shape like tracheids.
seive cells
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Are vascular tissues responsible for transporting photosynthetic products like carbohydrates.
Phloem
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the corresponding counterpart of the ground meristem in the vascular tissue.
Provascular Meristem
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Prevent water loss and the entry of aqueous substances.
cuticle
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The latter’s ends have holes known as perforations.
Vessel elements
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Made up of a single layer of parenchymatous cells devoid of chloroplasts.
epidermis
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Are epidermal outgrowths that can be unicellular or multicellular.Are epidermal outgrowths that can be unicellular or multicellular.
hair
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Are pores that control the exchange of gases and water transpiration in plants.
stomata