Water vapour comes out from the plant leaf through stomatal opening. through the same stomatal opening.  carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements using the following options

• Both processes can happen together because the diffusion coefficient of water and CO₂ is different

• The above processes happen only during night time

• One process occurs during day time and other at night

• One process occurs during day time and other at night

Which of the following criteria dows not pertain to facilitate transport?

• Requirement of special membrane proteins

• High selectivity

• Transport saturation

• Transport saturation

Roots play insignificant role in absorption of water in

• Sunflower

• Pistia

• Pea

• Pea

Tracheids differ from other treachery elements

• having Casparian strips

• being imperforate

• lacking nucleus

• lacking nucleus

Root pressure develops due to

• active absorption

• low osmotic potential in soil

• passive absorption

• passive absorption

A column of water within xylem vessels of tall trees does not break under its weight because of

• Dissolved sugars in water

• Tensile strength of water

• Lignification of xylem vessels

• Lignification of xylem vessels

A protoplast is a cell

• without plasma membrane

• without nucleus

• undergoing division

• undergoing division

8.

Which one of the following is correctly matched?

• Passive transport of nutrients - ATP

• Apoplast - Plasmodesmata

• Potassium-Readily mobilization

• Potassium-Readily immobilization

Approximately seventy percent of carbon dioxide absorbed by the blood will be transported to the lungs

• as bicarbonate ion

• in the form of dissolved gas molecules

• by binding to RBC

• by binding to RBC

Transpiration and root pressure cause water to rise in plant by?

• pulling it upward

• pulling and pushing it, respectively

• pulling it upward

• pulling it upward