Chapter 11 – Growth
Chapter 11
Growth
Multiple Choice Questions
1. ___________ is defined as an irreversible increase in mass due to the division and
enlargement of cells.
2. Genes, acting in conjunction with the environment, control patterns of
_________________.
Chapter 11 – Growth
3. Hormones differ from vitamins in all of the following ways EXCEPT
4. Internal environmental factors coordinating plant growth and development include
________.
Chapter 11 – Growth
5. External environmental factors influencing plant growth and development include
__________.
6. The plant physiologist credited with the discovery of auxins was
Chapter 11 – Growth
7. Which of the following groups of plants tends to be the least sensitive to auxins?
8. Phenylacetic acid (PAA) is a/an ____________.
Chapter 11 – Growth
9. Which of the following pertaining to auxins is true?
10. A precursor is
Blooms: 1. Remember
11. The defoliant Agent Orange was a 1-to-1 mixture of 2,4-D and
Chapter 11 – Growth
12. Auxins promote the growth of the stem by
13. One cellular process that is affected by auxin is the ____________________.
Chapter 11 – Growth
14. An important commercial use of auxin is to
15. Naturally occurring and synthetic __________ such as 2,4-D, are the basis of many ‘weed
killers’, especially for broad leaf weeds in lawns.
Chapter 11 – Growth
16. The Japanese scientist who reported the discovery of bakane (“foolish seedling”) effect on
rice was
17. Which of the following functions as a precursor in the synthesis of gibberellins?
Chapter 11 – Growth
18. Which plant hormone was isolated from a fungus causing “foolish-seedling disease”?
19. Commercial chrysanthemum growers may use a growth retardant to produce short, sturdy
plants. It acts by blocking synthesis of ______________.
Chapter 11 – Growth
20. Which of the following plant growth processes appear to be affected by gibberellin?
21. The most important effect of cytokinin is its influence on
22. Which of the following is used by nurseries to cause active plants to become dormant?
Chapter 11 – Growth
23. Which of the following is synthesized from carotenoid pigments in plastids?
24. Absicsic acid is associated with maintaining ___________ in buds and seeds.