A) tracheae and sieve tubes
B) tracheids, tracheae and sieve tubes
C) tracheae, sieve cells and sieve tubes
D) tracheids, tracheae and sieve cells
Correct Answer: B
Solution :
In angiosperms, xylem consists tracheids, vessel or tracheae, xylem fibres and xylem parenchyma. Tracheae are absent in pteridophytes and gymnosperms. In angiospermic phloem, sieve elements are sieve tubes, while in gymnosperms and pteridophytes sieve cells are found.You need to login to perform this action.
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