Tracheids are
1. Elongated cells with tapering ends and unperforated end walls
2. Elongated cells with tapering ends and perforated end wall
3. Rounded cells with lignified walls
4. Both (1) and (2)

Interxylary phloem formed in Salvadora due to abnormal secondary growth is also known as
1. Included phloem
2. Internal phloem
3. External phloem
4. Vestigial phloem

Cambium found in vascular bundles of dicot stem is
1. Intercalary meristem
2. Fasicular cambium
3. Secondary meristem
4. All of the above

Pectin deposited in plant cell walls is
1. excretory product
2. secretory product
3. both 1 and 2 above
4. never deposited

The terminal and axillary buds arise from

Four radial vascular bundles are formed in
1. monocot root
2. dicot root
3. monocot stem
4. dicot stem

Vessels are found in
1. All angiosperms
2. Most angiosperms, few gymnosperms and few pteridophytes
3. All angiosperms and few gymnosperms
4. Most angiosperms and few gymnosperms

Which of the following is true about tracheids and vessels
1. Tracheids are multicellular with narrow lumen
2. Tracheids are unicellular with wide lumen
3. Vessels are multicellular with wide lumen
4. Vessels are unicellular with narrow lumen

The cells of the quiescent center are characterized by
1. having dense cytoplasm and prominent nuclei
2. having light cytoplasm and small nuclei
3. dividing regularly to add to the corpus
4. dividing regularly to add to tunica

Common feature in vessel elements and sieve tube elements is