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Vessels are absent in
Vessels are absent in
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Solution
The correct option is C Gymnosperms
Gymnosperms grow in cold and dry climates and they don't have a need for water as compared to angiosperms. Hence they do not possess vessels. Exceptionally the order Gnetales (considered as advanced gymnosperms) have vessels in their xylem. Also, in cold climates vessels can be too efficient, because the fast draw on water can lead to air locks when water freezes. That’s why deciduous broad-leaved trees in temperate climates - that do have vessels - cut their losses by going dormant in the winter. So, the correct answer is 'Gymnosperms'.
Gymnosperms grow in cold and dry climates and they don't have a need for water as compared to angiosperms. Hence they do not possess vessels. Exceptionally the order Gnetales (considered as advanced gymnosperms) have vessels in their xylem. Also, in cold climates vessels can be too efficient, because the fast draw on water can lead to air locks when water freezes. That’s why deciduous broad-leaved trees in temperate climates - that do have vessels - cut their losses by going dormant in the winter.
So, the correct answer is 'Gymnosperms'.
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