Botany I
PLSC 101
Fall 1999
Quiz 4
NAME___________________________________
SECTION________
1. If all cell surface receptors are inactivated, what is possible alternative
mechanism by which plant growth regulators can mediate a response
based on the diagram shown in class? (3 pts)
2. You decide to root a cutting of your favorite houseplant. What growth
regulator would you use to initiate roots? After the cutting has rooted,
as you are planting it, you treat the cutting with the same high
concentration of this growth regulator. What is the effect on root
growth? After the cutting is transplanted the roots begin to grow
down. This is due to what tropic response? (3 pts)
3. Given the following four growth regulators, what is one growth
response mediated by each: (4 pts)
Auxin
Cytokinin
Gibberellin
Abscissic acid
