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Cards In This Set
| Front | Back |
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Evergreen trees lose their leaves _____.
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steadily all year
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 The abscission layer is indicated by the letter _____. |
C
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The breakdown of chlorophyll reveals the _____ pigments of a leaf.
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Carotenoid
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The formation of the abscission layer cuts off transport of substances to and from the leaf. As the concentration of sugar trapped within a leaf increases, _____ pigments are produced.
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Anthocyanin
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The protective layer that forms between the abscission layer and the stem consists of _____.
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Densely colored cells filled with a waxy layer
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After leaf abscission, growth will resume from the _____.
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Axillary bud
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_____ trees lose their leaves in preparation for winter.
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Deciduous
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For a short-day plant, the _____ is critical in determining if flowering will occur.
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minimum number of hours of darkness
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For a long-day plant, the _____ is critical in determining if flowering will occur.
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Maximum number of hours of darkness
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Day-neutral plants flower regardless of _____.
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Day length, night length, or photoperiod
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Which of these would inhibit flowering in a short-day plant with a critical night length of 12 hours?
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12 hours of light, 6 hours of dark, a flash of red light, 6 hours of dark
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Which of these would stimulate flowering in a long-day plant with a critical night length of 12 hours?
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12 hours of light, 6 hours of dark, a flash of red light, 6 hours of dark
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