Which of the following extra-embryonic membranes in amniotes primarily functions in waste storage?
Chorion
Amnion
Yolk sac
Allantois
Related Questions
S-shaped or sigmoid growth curve have
I. lag phase
II. log phase
III. stationary phase
IV. diminishing growth phase
Select the correct option
All except IV
All except III
All except II
I, II, III and IV
During tissue culture, if parenchyma cells from a potato tuber are used to generate callus, what process are the cells undergoing?
Redifferentiation
Transdifferentiation
Dedifferentiation
Cell elongation
Which one is the example of dedifferentiation?
Procambium and vascular cambium
Cork cambium and interfasicular cambium
Cork cambium and vascular cambium
Procambium and cork cambium
In tissue culture experiments, leaf mesophyll cells are placed in a culture medium to form callus. This phenomenon is known as:
Redifferentiation
Dedifferentiation
Differentiation
Transdifferentiation
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.
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.
Which of the following cellular processes is responsible for the formation of interfascicular cambium from differentiated parenchyma cells in dicot stems?
Totipotency
Dedifferentiation
Redifferentiation
Differentiation
Plants follow …A… pathways in response to environment or phases of life to form different kind of structures. This ability is called …B… Complete the given statement with the correct combination of options
A-same; B-elasticity
A-elasticity; B-same
A-different; B-plasticity
A-same; B-plasticity
Among the following, which plant shows the least phenotypic variation in response to water availability?
A desert cactus
A grassland wildflower
A submerged aquatic plant
A deciduous tree
Phellem is formed by phellogen through
Differentiation
Dedifferentiation
Redifferentiation
Plasticity
