Download Plant Hormones test yourself questions

Test your Understanding Questions
Multiple Choice Questions
1. Tropism:
A. is the loss of water through the leaves of a plant
B. occurs when a plant moves in response to a stimulus
C. is the wilting that occurs when a plant receives insufficient water
2. A plant tropism where the plant responds towards a stimulus is:
A. positive
B. negative
C. unreliable
3. The growth of plant roots towards the earth is:
A. geotropism
B. gravitropism
C. both of the above
4. Auxins responsible for phototropism are produced in the shoot tip called the:
A. xylem
B. root hairs
C. coleoptile
5. The response of certain plants to touch is:
A. thigmotropism
B. geotropism
C. phototropism
6. Elongation of cells is produced by hormones called:
A. insulin
B. auxins
C. both of the above
True-False Questions
7. Positive phototropism is the bending of a plant towards light. T / F
8. The growth of a plant shoot away from the earth is positive geotropism.
9. The only plant hormones are auxins. T / F
T / F
Short Answer Questions:
1. What is the difference between plant and animal hormones?
2. What makes the way that ethylene acts on plant cells different from all other plant
hormones?
3. The ripening of fruit is associated with the gas ethylene, which increases the rate of
enzymes such as amylase that convert starch into simple sugars. The ripening of fruit is
also linked to oxygen consumption.
a. Oxygen is consumed by plants regardless of whether fruit is ripening, why?
b. Why do plants breakdown starch into simple sugars as part of the fruit ripening
process?
4. When a seed is planted in the soil what type of tropism do the roots display? Why?
5. Which hormone is likely to be found in high concentrations during a drought? Why?
6.
A student set up a series of experiments by covering various parts of the stem to
determine the role of sunlight in plant growth.
A
B
C
D
E
F
a. Which of the plants above would bend towards the light?
b. Why wouldn’t all of the plants bend towards the light?
c. Which hormone is responsible for the growth being monitored in this experiment?
d. Outline what causes the plants to bend towards the light.
7.
a. Auxins are thought to be involved in apical dominance, design an experiment to
test this hypothesis. Use the space below to draw the set-up.
b. What your expected results be in the experiment designed in part a?