Campbell Biology (11th Edition)
11th Edition
ISBN: 9780134093413
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Textbook Question
Chapter 39.1, Problem 1CC
What are the morphological differences between dark-and light-grown plants? Explain how etiolation helps a seedling compete successfully.
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What are the morphological differences between darkand light-grown plants? Explain how etiolation helps aseedling compete successfully.
In a common eudicot pattern of development for the common bean in the figure, the radicle emerges from the seed (1), then begins to develop into a primary root that grows down into the soil. As this occurs, the hypocotyl emerges from the seed and bends into the shape of a hook (2). The bent hypocotyl lengthens and pulls the cotyledons upward (3). When the hypocotyl reaches the soil surface, exposure to light causes it to straighten (4). Primary leaves emerge from between the cotyledons and begin photosynthesis. The cotyledons typically undergo a period of photosynthesis before shriveling (5). Eventually, the cotyledons fall off the lengthening stem, and the young plant’s new leaves produce all of its food.
a)
Identify and explain what environmental factors influence the timing and coordination of the germination of seeds.
What are three functions of the shoot apical meristem?
Chapter 39 Solutions
Campbell Biology (11th Edition)
Ch. 39.1 - What are the morphological differences between...Ch. 39.1 - Cycloheximide is a drug that inhibits protein...Ch. 39.1 - Prob. 3CCCh. 39.2 - Prob. 1CCCh. 39.2 - WHAT IF? If a plant has the double mutation err...Ch. 39.2 - MAKE CONNECTIONS What type of feedback process is...Ch. 39.3 - If an enzyme in field-grown soybean leaves is most...Ch. 39.3 - WHAT IF? If a plant flowers in a controlled...Ch. 39.3 - MAKE CONNECTIONS Plants detect the quality of...Ch. 39.4 - Prob. 1CC
Ch. 39.4 - Prob. 2CCCh. 39.4 - Prob. 3CCCh. 39.5 - What are some drawbacks of spraying fields with...Ch. 39.5 - Chewing insects mechanically damage plants and...Ch. 39.5 - Many fungal pathogens get food by causing plant...Ch. 39.5 - WHAT IF? Suppose a scientist finds that a...Ch. 39 - What are two common ways by which signal...Ch. 39 - Is there any truth to the old adage, "One bad...Ch. 39 - Why did plant physiologists propose the existence...Ch. 39 - Plants that have acclimated to drought stress are...Ch. 39 - Prob. 39.5CRCh. 39 - Prob. 1TYUCh. 39 - Prob. 2TYUCh. 39 - Prob. 3TYUCh. 39 - How may a plant respond to severe heat stress? (A)...Ch. 39 - Level 2: Application/Analysis 5. The signaling...Ch. 39 - If a long-day plant has a critical night length of...Ch. 39 - Prob. 7TYUCh. 39 - DRAW IT Indicate the response to each condition by...Ch. 39 - Level 3: Synthesis/Evaluation 9. EVOLUTION...Ch. 39 - SCIENTIFIC INQUIRY A plant biologist observed a...Ch. 39 - SCIENCE. TECHNOLOGY, AND SOCIETY Describe how our...Ch. 39 - Prob. 12TYUCh. 39 - Prob. 13TYU
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- In mango seed, orange seed, and apple seed, what are the type of endosperm when present?arrow_forwardHow and from where do cotyledons develop from for a bean seed?arrow_forwardWhat are the external factors on seedling growth? and what are their effects in seed growth and germination? (The seeds used in the experiment are monggo seeds)arrow_forward
- Explain the process of secondary growth in the stems of woody angiospermswith the help of schematic diagrams. What is its significance?arrow_forwardWhat is the water content of matured seed and what is the reason behind for the low water content? *arrow_forwardIn the heart embryo stage of Arabidopsis thaliana, there are three key anatomical features that are essential for plant development. The red highlighted cells will become the the yellow highlighted cells will become the and the two "lobes" of the heart will become the suspensor; apical meristem; seed coat basal daughter cell; apical daughter cell; cotyledons shoot apical meristem; root apical meristem; taproots suspensor; shoot apical meristem; taproots root apical meristem; shoot apical meristem; cotyledonsarrow_forward
- What is the precursor of the intercalary meristem? How does the intercalary meristem contribute to the growth of the plant?arrow_forwardWhat is the endosperm? From which cell of the female gametophyte is it derived? Compare the storage site of endosperm in monocot and dicot seeds.arrow_forwardDescribe three mechanisms whereby seed dormancy is broken in different types of seeds. How are these mechanisms related to the typical environment of the plant?arrow_forward
- What are the major benefits of gravitropism for a germinating seedling?arrow_forwardWhat is pollen gain? What is pollinations? What are some different ways pollen can be dispersed?arrow_forwardDescribe and explain the results shown in Table 1 and suggest how the results might have differed if lengths of root had been used.arrow_forward
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