A vesselless piece of stem possessing prominent sieve tubes would belong to
(a) Pinus
(b) Eucalyptus
(c) Grass
(d) Trochodendron
Optio0n (d) Trochodendron - The species of this genus have a very unique feature of the angiosperms, i.e., it lacks vessel elements in its wood, but has prominent sieve tube cells.