A piece of wood having no vessels (trachea) must belong to
1. teak
2. mango
3. pine
4. palm
14. Fibres are likely to be absent in
(a) secondary phloem
(b) secondary xylem
(c) primary phloem
(d) leaves
A vesselless piece of stem possessing prominent sieve tubes would belong to
1. Pinus
2. Eucalyptus
3. Grass
4. Trochodendron