Plant Structure and Function

Question 1

How is indicator used in the experiment for light intensity and photosynthesis.

Answer 1

Hydrogen carbonate indicator turns yellow in slightly acidic solutions, and purple in slightly alkaline solutions.

Question 2

Define osmosis.

Answer 2

Osmosis is the movement of water from high water potential to low water potential across a partially permeable membrane.

Question 3

How do auxins orchestrate tropisms?

Answer 3

Auxins diffuse in greater quantities to the shadier or lower side, where they stimulate growth more or less depending on the case.

Question 4

Describe commercial uses of auxins, gibberellins, and ethene in plants.

Answer 4

• Auxins in weed killers and rooting powders.
• Gibberellins in germination, fruit and flower formation, and the production of seedless fruit.
• Ethene in ripening.