Dedifferentiation occurs during the formation of?
Cork cambium
Vascular cambium
1 and 2
Sclerenchyma
Related Questions
I. The 1° and 2° phloem get gradually crushed due to the continued formation and accumulation of 2° xylem
II. 1° xylem remains more or less intact in or near the centre
III. Secondary growth results in an increase in the length of the axis
Select the correct statements
I and II
II and III
I and III
I, II and III
Which meristem is responsible for the production of secondary tissues?
Primary meristem
Root apical meristem
Shoot apical meristem
Secondary meristem
Lenticels are pores found in the bark of woody stems. What is their primary function?
Water transport
Nutrient absorption
Gas exchange
Protection against herbivores
Wood is
Primary phloem
Primary xylem
Secondary xylem
Secondary phloem
A student examines a cross-section of a tree trunk and observes distinct rings. The lighter-colored rings represent:
Springwood
Autumnwood
Heartwood
Sapwood
Which of the following is an INCORRECT statement about chromosome numbers during cell division?
Chromosome number remains constant throughout mitosis.
Chromosome number is reduced by half during meiosis I.
Chromosome number remains constant throughout meiosis.
Sister chromatids separate during mitosis and meiosis II.
In dicot stem, secondary xylem lie towards the …A… and secondary phloem lie towards the …B… .
Choose the correct combination of options for A and B
A-pith; B-periphery
A-periphery; B-pith
A-periphery; B-laterally
A-pith; B-laterally
Phellogen is responsible for producing:
(A) Secondary xylem
(B) Secondary phloem
(C) Cork
(D) Pith
A
B
C
D
Identify the INCORRECT statement regarding mitosis.
Mitosis is essential for growth and repair of tissues.
Mitosis produces two genetically identical daughter cells.
Mitosis is a type of asexual reproduction.
Mitosis results in daughter cells with half the number of chromosomes as the parent cell.
Which of these would likely NOT exhibit significant increases in stem diameter due to secondary growth?
Herbaceous plants
Woody shrubs
Trees
Conifers
