Phellem is formed by phellogen through
Differentiation
Dedifferentiation
Redifferentiation
Plasticity
Related Questions
Efficiency index in the exponential phase of geometrical growth is the ability of plants to produce
Cell wall
New enzyme
New plant material
Young ones through mitosis
Unlike the formation of vascular tissues from procambium, the development of interfascicular cambium from parenchyma cells represents:
Redifferentiation
Dedifferentiation
Differentiation
Cell maturation
The process of organogenesis in vertebrate embryos is heavily influenced by epithelial-mesenchymal transitions (EMTs). Which of the following is NOT a characteristic feature of EMT during organogenesis?
Loss of cell adhesion molecules.
Increased cell motility.
Increased cell proliferation within the epithelium.
Degradation of the extracellular matrix.
If a plant exhibits minimal changes in its physical characteristics despite significant changes in nutrient levels in the soil, it can be said to have low:
Plasticity
Adaptability
Resilience
Tolerance
A mutation affects the function of the Hox genes in a developing Drosophila embryo. Which of the following is the MOST likely consequence?
Premature termination of embryonic development.
Failure of gastrulation.
Homeotic transformations, leading to segments developing with characteristics of other segments.
Lack of differentiation of germ layers.
Double fertilization is a characteristic feature of:
Gymnosperms
Angiosperms
Pteridophytes
Bryophytes
The process by which cells loose their specialisation is called
Dedifferentiation
Differentiation
Transdifferentiation
Apoptosis
During human embryonic development, the formation of the primitive streak marks a crucial step. Which of the following statements regarding the primitive streak is INCORRECT?
It marks the beginning of gastrulation.
It defines the embryo's axes.
It is the source of mesoderm and endoderm.
It persists throughout development.
Which of the following exhibits the least plasticity?
Glass
Copper
Steel
Gold
Which process is demonstrated by the formation of interfascicular cambium from fully differentiated parenchyma cells?
Differentiation
Redifferentiation
Cell elongation
Dedifferentiation
