21.

Which one of the following is not a vertebrate?

• Sea cow

• Sea lion

• Sea horse

• Sea hare

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

Viscum album grown on trees. This is an example of

• Symbiosis

• Parasitism

• Commensalism

• Predation

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

Given below is the chemical formula of

• Palmitic Acid

• Glycerol

• Galactose

• Stearic acid

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