Plant transport, hormone and response

Which one of the following statements about the function of the water-carrying tubes is correct?

• The water-carrying tubes help the plant to make food.
• The water-carrying tubes keep the plant upright.
• The water-carrying tubes transport water and dissolved mineral salts from the roots to the rest of the plant.
• The water-carrying tubes transport food made by the leaves to the rest of the plant. 

The diagram below shows how both A and B are transported in a plant.
What could be represented by A and B?

• A : Water 
  B : Mineral
• A : Food
  B : Water
• A : Mineral
  B : Food
• A : Mineral 
  B : Water

The root pressure which plays a small part in xylem is caused by _____

• transpiration of water out of the xylem

• cohesion of water molecules to one another

• adhesion of water molecules to the xylem wall

• salts concentration that cause flow of water into the xylem

Transpiration is _____

• the movement of water through a plant from the roots up the stem

• the loss of water from the leaves of a plant by the process of evaporation

• the flow of water into plant roots by osmosis from the soil

• the process of minerals and sugars moving through plant veins

Nutrients transport in phloem flows from ______

• sugar sink to a sugar source (source cell)

• sugar source (source cell) to a sugar sink

• leaf to a root

• leaf to xylem

Which of the following functions as a source during translocation in plants?

• Merismetic tissue in the root

• Leaves

• Roots

• Fruits and flowers

Root pressure which plays a small role in xylem flow is caused by

• transpiration of water out of the xylem.

• cohesion of water molecules to one another

• adhesion of water molecules to walls of the xylem

• osmotic flow of water into the xylem

The theory which states that transpiration pull is responsible for carrying water upward through the xylem is called

• cortex-xylem theory

• cohesion-pressure theory

• cohesion-tension theory

• pressure-tension theory

Movement of water up a plant through the xylem vessels is due to?

I Transipration-cohesion-tension mechanism

II Root pressure

III Presure flow

• I only

• I and II only

• II and III only

• I, II and III

Which of the following are plant hormones

• Auxin

• Cytokinin

• Gibberellin

• Abcissic acid, ethylene

• All