CAMPBELL BIOLOGY IN FOCUS-W/MASTR.BIO.
3rd Edition
ISBN: 9780134875040
Author: Urry
Publisher: PEARSON
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Chapter 31, Problem 5TYU
Summary Introduction
Introduction:
The stimulus that plants mostly take from the environment is photoperiod. Night length is responsible for controlling the flowering and other responses to photoperiod.
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A long day plant is given a long night, and is interrupted by a light pulse in the middle of the night. Which quality of the light pulse will most likely prevent flowering?
Select one:
a.
UV light
b.
green light
c.
red light
d.
far-red light
In the Philippines, owners and managers of plant nurseries have to plan lighting schedules for a long-day plant (LDP) with a critical night length of 10 hours that will flower in December. What lighting periods and color of light enrichment will be most effective for flowering of the said LDP?
A. Light periods of 15 hours with light enriched in the red range of the spectrum
B. Dark periods of 11 hours with light enriched in the red range of the spectrum
C. Light periods of 14 hours with light enriched in the far-red range of the spectrum
D. Dark periods of 9 hours with light enriched in the far-red range of the spectrum
E. Light periods of 13 hours with light enriched in the red range of the spectrum
F. Dark periods of 10 hours with light enriched in the far-red range of the spectrum
Which of the given plant hormone will be more abundant in dormant buds and seeds?
a.Gibberellin
b.ABA
c.Ethylene
d.Auxin
Chapter 31 Solutions
CAMPBELL BIOLOGY IN FOCUS-W/MASTR.BIO.
Ch. 31.1 - Prob. 1CCCh. 31.1 - WHAT IF? If a plant has the double mutation ctr...Ch. 31.1 - Prob. 3CCCh. 31.2 - If an enzyme in field-grown soybean leaves is most...Ch. 31.2 - WHAT IF? If a plant flowers in a controlled...Ch. 31.2 - MAKE CONNECTIONS Plants detect the quality of...Ch. 31.3 - Prob. 1CCCh. 31.3 - Prob. 2CCCh. 31.3 - Prob. 3CCCh. 31.4 - Prob. 1CC
Ch. 31.4 - Chewing insects mechanically damage plants and...Ch. 31.4 - Prob. 3CCCh. 31 - The hormone that helps plants respond to drought...Ch. 31 - Prob. 2TYUCh. 31 - Prob. 3TYUCh. 31 - Prob. 4TYUCh. 31 - Prob. 5TYUCh. 31 - Prob. 6TYUCh. 31 - DRAW IT Indicate the response of Arabidopsis to...Ch. 31 - Prob. 8TYUCh. 31 - FOCUS ON EVOLUTION As a general rule,...Ch. 31 - FOCUS ON INTERACTIONS In a short essay (100-150...Ch. 31 - Prob. 11TYU
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- What is the problem with weed seed? Select one: a. other color b. bad smell c. low moisture content d. toxicarrow_forwardWhich of the following plants requires light hours above than critical photoperiod for flowering? a.Henbane b.Tobacco c.Pepper d.Cucurbitarrow_forwardThe drawing shows a plant that reproduces vegetatively. Use the drawing in answering the following questions: 1. Predict what will happen before shoots A, B, and C becomes independent plants. 2. Infer what will happen to shoots D and E. 3. How might a gardener assist this process.arrow_forward
- 1. A short-day plant flowers only when exposed to light for less than 12 hours long. Which of the following would cause the plant to flower a 12-hour day and 12-hour night with a flash of red light b. an 8-hour day and 16-hour night with a flash of white light after 8 hours c. 9-hour night and 15-hour day with 1 minute of darkness after 7 hours d. 13-hour night and 11-hour day with 1 minute of darkness after 6 hours e. 24 hours of continuous lightarrow_forwardMark the incorrect statement a.Plants show open form of growth b.Plants have self perpetuating cells throughout the life c.Inplants meristems are present only at root and shoot tips d.Cells found next to meristematic zone also show growtharrow_forwardOwners and managers of plant nurseries have to plan lighting schedules lor a long-day plant that will flower in February. What lighting periods will be most effective? What color of light should be chosen?arrow_forward
- Approximately how much chlorophyll was present in the moderate-light plants after 24 hours? A. about 200 micrograms/g B. about 225 micrograms/g C. about 300 micrograms/g D. about 400 micrograms/garrow_forwardIf you exposed seeds to a series of red light versus far-red light treatments, which of the following exposure treatments would result in seed germination? a. Red; far-red b. Far-red; red c. Red; far-red; red; far-red; red; far-red; red; far-red d. Both a and c are correct.arrow_forwardexplain answerarrow_forward
- Approximately how much chlorophyll was present in the low-light plants after 24 hours? A. about 200 micrograms/g B. about 225 micrograms/g C. about 300 micrograms/g D. about 400 micrograms/garrow_forwardIf a long-day plant has a critical night length of 9 hours, which 24-hour cycle would prevent flowering? (A) 16 hours light/8 hours dark (B) 14 hours light/10 hours dark (C) 4 hours light/8 hours dark/4 hours light/8 hours dark (D) 8 hours light/8 hours dark/light flash/8 hours darkarrow_forwardWe know that short-day plants do not really need short days, but actually long nights. Describe the type of treatment that proves this. Is some kind of light given during the night or some period of darkness given during the day?arrow_forward
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