In plants exhibiting unusual secondary growth, like in Bougainvillea, the additional cambia arise from:
Residual procambium cells
Cells of the pith
Cells of the cortex or pericycle
Differentiated xylem parenchyma
Related Questions
I. Primary tissues of plants add length to the roots and shoots
II. Secondary tissue of plants adds diameter to the roots and shoots
III. Cells of permanent tissue are specialised both structurally and functionally
Which of the above statement is/are true?
All except I
All except II
All except III
I, II and III
Which of these is NOT a characteristic feature of meristematic cells?
Thin cell walls
Dense cytoplasm
Prominent nuclei
Presence of large central vacuole
Viral infection is usually absent in
Phloem cells
Xylem cells
Pith cells
Apical meristem
All are cylindrical meristems except?
Cork cambium
Fasicular cambium
Both 1 and 2
Apical meristems
Which of the following statements is INCORRECT regarding the quiescent center in root apical meristem?
It has a low rate of cell division.
It acts as a reserve of cells for the root apical meristem.
It is relatively inactive.
It has a high rate of cell division.
Which of these is NOT a function of meristematic tissue?
Photosynthesis
Cell division
Growth in length
Growth in girth
Which of the following statements is INCORRECT regarding the development of floral appendages?
(a) They arise from the condensed internodes of the modified shoot.
(b) They are formed laterally at successive nodes.
(c) They completely replace the leaves on the floral shoot.
(d) They are produced by the floral meristem.
a
b
c
d
A branch or a flower develops in the axil of the leaves by the activity of
axillary bud
terminal bud
intercalary meristem
apical meristem
Choose the correct statement
A group of cell having common origin generally perform common function
All of the cells in a plant body are capable of dividing
Permanent tissues have all cells same in function but different in structure
None of the above
A nail is driven into the trunk of a 30 years old tree at a point 1 m above the soil level. The tree grows in height at the rate of 0.5m a years. After three years, nail will be
1 m above the soil
1.5 m above the soil
2 m above the soil
2.5 m above the soil
