(d) Production of callus tissue between the cells
of stock and scion
- In which one of the following there is no
differentiation of bark, sapwood and heartwood?
(a) Ashoka (b) Neem
(c) Mango (d) Date Palm - The total time in which growth occurs is called
(a) Phase of maturation
(b) Phase of cell division
(c) Phase of elongation
(d) Grand period of growth - After two or three years of secondary growth, the
cortex in dicot root
(a) Remains intact
(b) Is completely sloughed away
(c) Is largely lost
(d) Is converted into cork - Mature wood stem has a peripheral waterproof
tissue with opening in the form of scars on its
surface, they are
(a) Epidermal tissue (b) Guard cells
(c) Lenticels (d) Stomata - Vascular cambium forms xylem on inner side and
phloem on outer side due to
(a) Effect of gravity
(b) Shearing force of wind
(c) Intrafascicular nature
(d) Differential action of hormone - (d) Pro meristems are the group of cells which
represent early stages of meristematic cells
which are present in the embryonic shoots and
root apices which give rise to primary meristem. - (b) Meristematic cells are thin walled, nucleate
and with dense cytoplasm.
3. (b) Root apical meristem is sub apical due to
presence of root cap, where as shoot apical
meristem is apical.
4. (a) Intercalary meristems are derived from the
permanent tissues. They are situated at internodes
or stem regions where the leaves attach.
5. (d) Secondary meristem are derived from
the permanent tissues. Permanent tissues
differentiates into secondary meristem.
6. (b) Intercalary meristem is situated at the
internodes of stem where the leaves arise hence
they are involved in the elongation of stem in
monocots.
7. (a) Parenchyma is the simple tissue which is
present in the soft parts of the plants hence it is
present at the apices of the shoot which is soft and
tender.
8. (a)
9. (a) Primary growth is the increase in length of
shoot and root which is brought about by apical
meristem.
10. (d) Secondary meristems arise from the permanent
tissues always.