Pennsylvania State University

TURF 100

Quiz #4

1)As mowing heights decrease

1. 1. rooting increases
   2. cultural intensity decreases
   3. texture increases
   4. density decreases
   5. density increases

2. Plant hormones are signal molecules that are produced in one location and transported to effect other locations within the plant.
   1. TRUE
   2. FALSE

3. The following are considered different kinds of “growth” hormones:
   1. pectins, cellulases
   2. cytokinins, auxins, gibberellins
   3. abscisic acid, ethylene
   4. brassinosteroids, jasmonates, traumic acid
   5. florigen, salicylates

4. Which of the following represent the main structural parts of a grass tiller?
   1. shoot, roots, and crown
   2. leaf blades, leaf sheaths, and crown
   3. it’s a series of nodes and internodes
   4. leaves and roots
   5. auricles, ligules, and collar

5. Which type of root system is most dominant in a mature stand of turf?
   1. primary
   2. seminal
   3. adventitious
   4. tap
   5. side

6. Which part of the root controls geotropic curvature and produces a slime sheath?
   1. root hairs
   2. root caps
   3. root nodes
   4. endodermis
   5. cortex

7. What are the two types of branching in turfgrass?
   1. circumferential and lateral
   2. wide and narrow
   3. bunch-type and stoloniferous
   4. intravaginal and extravaginal