Ch. 14 Quiz

Question 1

If a bulb is planted, it’s orientation does not matter because the..

Answer 1

A and b

• Root grows downward due to positive gravitropism
• shoot grows upward due to negative gravitropism

Question 2

The first plant hormone discovered was ___.

Answer 2

Auxin

Question 3

If you want to produce a bushier shrub with more branches, you should..

Answer 3

Pinch off the stem tips

Question 4

The only plant hormone that is a gas is ___.

Answer 4

Ethylene

Question 5

At most plant nurseries, you can buy rooting powder that stimulates root development on stem cuttings. The rooting powder most likely contains..

Answer 5

Synthetic auxins

Question 6

Which of the following is an incorrect match between hormone and function?

Answer 6

Abscisis acid - releases buds from dormancy

Question 7

Cytokinin

Answer 7

Cell division

Question 8

Auxin

Answer 8

Stimulates stem elongation

Question 9

Gibberellin

Answer 9

Releases seeds from dormancy

Question 10

Ethylene

Answer 10

Latex production

Question 11

If a plant is placed in a horizontal position the..

Answer 11

Shoot bends upward due to increased auxin on the lower side

Question 12

If a flower opens at night and closes during the day, the response is..

Answer 12

Photonastic

Question 13

Hormones usually..

Answer 13

All of the above

• are produced at one site and act at a different site
• are effective in very low concentrations
• bind to receptor molecules located in a receptor cell plasma membrane
• activate programs in receptor cells

Question 14

The structure in mosses that produces an egg releases a chemical as it matures that attracts the flagellated sperm produced in a different structure. This is an example of…

Answer 14

Positive chemotaxis