STRUCTURAL ORGANISTION OF PLANTS AND ANIMALS
ANATOMY OF FLOWERING PLANTS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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On inner side
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On outer side
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Both on inner and outer side
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In centre
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Detailed explanation-1: -Protoxylem is the initially formed Xylem that develops before the plant organ is completely grown and Metaxylem is formed later. Under endarch condition in the plant stem, protoxylem lies at the center and metaxylem at the end of the organ.
Detailed explanation-2: -Endarch xylem. It is the arrangement in which the protoxylem is directed towards the center and metaxylem elements towards the periphery. It is the arrangement in which the protoxylem is directed towards the periphery and metaxylem towards the center.
Detailed explanation-3: -In exarch xylem, the protoxylem is towards the periphery whereas in endarch xylem, the protoxylem is towards the centre of the axis. Exarch condition of xylem is found in roots, whereas endarch condition occurs in stems.
Detailed explanation-4: –In exarch condition, the protoxylem (the first-formed xylem) lies towards the periphery and the metaxylem (the later-formed xylem) lies towards the center (pith). Hence, the youngest lies closest to the center in this type of arrangement. So, the answer is, “Exarch.”
Detailed explanation-5: -The xylem grows inside out in endarch type of xylem.