Vessels and companion cells are characteristics of
Angiosperm
Gymnosperm
Pteridophyta
Fern
(a) In angiosperms, companion cells are present in the phloem and true vessels are present in the xylem.
Distinguish between the following : Protoxylem and metaxylem
The centrifugal arrangement of the xylem is called
Fibres associated with phloem are…… .fibres.
An angiosperm differs from a gymnosperm by possessing
Sieve tubes have
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