In a ring girdled plant

• the shoot dies first

• the root dies first

• the shoot and root die together

• the shoot and root die together

Which one gives the most valid and recent explanation for stomatal movements?

• Transpiration

• Potassium influx and efflux

• Starch hydrolysis

• Starch hydrolysis

Which one gives the most valid and recent explanation for stomatal movements?

• Transpiration

• Potassium influx and efflux

• Starch hydrolysis

• Starch hydrolysis

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

16.

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