The Guard Cells Have Specialized Features are

a) guard cells have a characteristic dumbbell shape, with bulbous ends

b) guard cells are always flanked by a pair of differentiated epidermal cells called subsidiary cells

c) guard cells are present in organs from more primitive plants, such as the liverworts and the mosses

d) dicot plants and nongrass monocots, kidney-shaped guard cells have an elliptical contour with the pore at its center

Which of the following combination of above statement is TRUE?

#Question id: 28851

#Unit 2. Cellular Organization

Which of the following protein greatly enhancing the frequency of catastrophes?

#Question id: 10354

#Unit 6. System Physiology – Plant

One of the enzyme that are involve in the ammonium assimilation is Asparagine synthetase (AS), some statements given below about AS such as,

a) This enzyme that catalyzes this reaction, is found in the cytosol of leaves and roots and in nitrogen-fixing nodules

b) High levels of light and carbohydrate inhibit the expression of genes coding for AS and the activity of the enzyme

c) Conditions of ample energy stimulate AS, thus they favor nitrogen assimilation into glutamine and glutamate

d) Energy-limited conditions inhibit GS and GOGAT, stimulate AS, and thus favor nitrogen assimilation into asparagine, a compound that is rich in nitrogen and sufficiently stable for long-distance transport or long term storage

Which of the following statements about AS is correct?

#Question id: 22971

#Unit 7. System Physiology – Animal

#Question id: 12448

#Unit 10. Ecological Principles

#Question id: 28522

#Unit 5. Developmental Biology

The apical cell undergoes a series of divisions to generate a spherical, eight-cell (octant) globular embryo exhibiting radial symmetry, is called as____