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plant cell normally lacks
which one of the following is not considered as part of endomembranous system
CAM helps the plant in
which of the following structure is an organelle within an organelle?
Two cells A and B are contiguous. Cell A has osmotic pressure 10 atm. Turgor pressure 7 atm. and diffusion pressure deficit 3 atm. Cell B has osmotic pressure 8 atm. Turgor pressure 3 atm. and DPD 5 atm. The result will be
Movement of water from cell B to A
Equilibrium between the two
Movement of water from A to B
No movement of water
For its action nitrogenase requires
High input of energy
Super oxygen radical
The rupture and fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of
Weak gravitational pull
Cohesion and adhesion
Lignified thick wall
Guttation is a result of
identify the stage when homologous chromosomes segregates but their sister chromatids remain associated at centromere
which of the following cellular parts is correctly described?
thylakoids - flattened membranous sacs forming the grana of cholroplasts
centrioles - sites for active RNA synthesis
ribosomes - those on chloroplasts are large (80s) while those in the cytoplasm are smaller (70s)
lysosomes - optimally active at a pH of above 8.5
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