Which of the following is non-symbiotic nitrogen fixer organism?
VAM
Azotobacter
Anabaena
Rhizobium
The rupture and fractionation do not usually occur in water column in vessel/tracheids during the ascent of sap because of
Lignified thick walls
Cohesion and adhesion
Weak gravitational pull
Transpiration pull
The material, which arrests cell division, is obtained from
Crocus
Colchicum
Dalbergis
Chysanthomum
B.
Colchicum
Colchicine is an antibiotic drug, which is obtained from Colchicum (family-Liliaceae). It binds to one tubulin molecule an prevents its polymerisation. The depolymerisation of tubulin results in the disappearance of mitotic spindle blocking the cell's mitotic chromosomal division at metaphase and anaphase.
Which of the following is responsible for biological nitrogen-fixation?
Nife gene
Nitrogenase
Yeast alanin tRNA synthetase
RNA synthetase
The respiratory quotient during cellular respiration would depend on the
Nature of the enzymes involved
Nature of the substrate
Amount of carbon dioxide released
Amount of oxygen utilized
Which of the following supports a dense population of plankton and littoral vegetation?
Oligotrophic
Eutrophic
Lithotrophic
Agroecotrophic
Three floral diagrams are given here. Their respective families are assigned in the answer key. Find out the families to which these diagrams belong to
A-Liliaceae, B-Asteraceae, C-Solanaceae
A-Asteraceae, B-Solanaceae, C-BRassicaceae
A-Asteraceae, B-Solanaceae, C-Asteraceae
A-Poaceae, B-Solanaceae, C-Asteraceae