Chapter 11

Assertion: Pure water has greatest water potential. Reason: Pure water contain maximum free water molecule.

Assertion: All solutions have lower water potential than pure water. Reason: All solutions have fewer free water molecule.

Assertion: Wood is use to split rocks by prehistoric man. Reason: Imbibition of water by wood increases pressure by swelling help in splitting.

Assertion: Phloem translocates variety of organic and inorganic soluble. Reason: Phloem is conducting tissue of plant.

Assertion: Most water flow in the root occurs through apoplast. Reason: Cortical cells in root are loosely packed and offer no resistance to water movement.

Assertion: Endodermis is impervious to water Reason: Endodermis contain band of suberised matrix called casparian strip.

Assertion: when soft herbaceous stem cut near the base from sharp blade, early in the morning, drop of solution ooze out from cut stem. Reason: Root pressure develops in herbaccous stem.

Assertion: Root pressure docs not account for the majority of water transport in tall trecs. Reason: They need transpiration pull for ascent of water.