The movement of a gene from one linkage group to another is called

• inversion

• duplication

• translocation

• translocation

The function of leghemoglobin in the root nodules of legumes is 

• oxygen removal 

• nodule differentiation

• expression of nif gene

• expression of nif gene

Guttation is the result of 

• diffusion

• transpiration

• osmosis 

• osmosis 

Carrier ions like Na⁺ facilitate the absorption of substance like

• amino acids and glucose

• glucose and fatty acids

• fatty acids and glycerol

• fatty acids and glycerol

Guard cell help in

• protection against grazing

• transpiration

• guttation

• guttation

The rupture and fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of 

• lignified thick walls

• cohesion and adhesion

• weak gravitational pull

• weak gravitational pull

Passage cells are thin-walled cells found in

• endodermis of roots facilitating rapid transport of water from cortex to pericycle

• phloem elements that serve as entry points for substance for transport to other plant parts

• testa of seeds to enable emergence of growing embryonic axis during seed germination

• testa of seeds to enable emergence of growing embryonic axis during seed germination

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 diffusion pressure deficit 5 atm. The result will be

• Movement of water from cell B to A

• No movement of water

• Equilibrium between the two

• Equilibrium between the two

139.

The translocation of organic solutes in sieve tube members is supported by

• root pressure and transpiration pull

• P-proteins

• mass flow involving a carrier and ATP

• mass flow involving a carrier and ATP

Which of the following is made up of dead cells?

• Xylem parenchyma

• Collenchyma

• Phellem

• Phellem