Matching. Choose the one most appropriate answer
for each. Some letters may not be used.
1. ___ abscisic acid
2. ___ annual
3. ___ biennial
4. ___ coleoptile
5. ___ ethylene
6. ___ salicylic acid
7. ___ gibberellin
8. ___ auxin
9. ___ phytochrome
10. ___ circadian
11. ___ short-day plant
12. ___ target cell
13. ___ long-day plant
14. ___ Pfr
15. ___ vernalization
A. flower each successive year or after
several years of vegetative growth
B. promotes cell elongation in stems
C. has receptor sites for a particular hormonal
message
D. a hollow, cylindrical organ that protects
young leaves growing within it
E. blue-green pigment that absorbs light
energy
F. low-temperature stimulation of flowering
G. stimulates stomata closure and might be
involved in root geotropism
H. stimulates fruit ripening
I. reproduces in spring
J. produces only roots, stems, and leaves the
first growing season and produces flowers
the second year
K. occurring on a 24-hour cycle
L. flowers in autumn
M. a nonhormonal plant growth regulator
N. lives for only one growing season
O. promotes stem elongation in plants
P. pigment involved in flowering process
Answers: 1. G, 2. N, 3. J, 4. D, 5. H, 6. M, 7. O, 8. B, 9. E, 10. K,
11. L, 12. C, 13. I, 14. P, 15. F
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