EBK CAMPBELL BIOLOGY
11th Edition
ISBN: 9780134446417
Author: Reece
Publisher: PEARSON
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Chapter 39.4, Problem 3CC
Summary Introduction
To explain: The response of root to the gravity after the removal of root cap.
Concept introduction: Gravitropism is defined as the growth of root towards gravity and growth of shoot towards light.
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Chapter 39 Solutions
EBK CAMPBELL BIOLOGY
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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- WHAT IF? Suppose an Arabidopsis mutant lackingfunctional aquaporin proteins has a root mass threetimes greater than that of wild-type plants. Suggest anexplanation.arrow_forwardIf you removed the root cap from a root, would the root still respond to gravity? Explain.arrow_forwardWater potential a) The value for Ψ in root tissue was found to be -3.3 bars. If you take the root tissue and place it in a 0.1 M solution of sucrose at 20°C in an open beaker, what is the Ψ of the solution, and in which direction would the net flow of water be? b) NaCl dissociates into 2 particles in water: Na+ and Cl-. If the solution in question 4 contained 0.1M NaCl instead of 0.1M sucrose, what is the Ψ of the solution, and in which direction would the net flow of water be? c) A plant cell with a Ψs of -7.5 bars keeps a constant volume when immersed in an open-beaker solution that has a Ψs of -4 bars. What is the cell’s ΨP?arrow_forward
- Visual Skills How do bean and maize seedlings protect their shootsystems as they push through the soil?arrow_forwardCan you answer this question with both parts a. How does plant growth respond to gravity in stems vs. roots? b. How is gravitropism controlled during root growth?arrow_forwardInstructions: MULTIPLE CHOICE Only choose the correct answer, and no need for an explanation. 1. Which region of the root in longitudinal section functions primarily for the absorption of water? A. meristematic region B. region of elongation C. root cap region D. region of maturation 2. Which of the following benefits to plant roots are derived from symbiotic Rhizobium bacteria? A. It provides plant resistance to drought. B. It is a source of nitrogen for roots. C. It provides plant resistance to pathogenic organisms D. It aids in nutrient absorption. 3. Which of the following is a characteristic of the endotrophic mycorrhizae root symbiont? A. Mycorrhizae invades the cytoplasm of root cortical cells. B. It forms an encrusting layer of hyphae called the mantle. C. Occur in the roots of pines and oaks trees. D. Mycorrhizae penetrates the root cortex but…arrow_forward
- WHAT IF? A peanut farmer finds that the older leavesof his plants are turning yellow following a long periodof wet weather. Suggest a reason why.arrow_forwardRoot hairs greatly increase the root’s surface area. In rye, a single plant has been found to have __________________ lateral roots with ________________ km of root length and a surface area of _________________ m2. Convert the length to miles (1 mile = 1.6 km) and the area to square feet (1 foot = 0.3 m).arrow_forward1. What is the beneficial effects of silicon? 2. Explain the mechanisms that regulate the ion xylem loading.arrow_forward
- The water potential in the leaves is -30 MPa and -20 MPa in the xylem, the water moves to the _ and if the water potential in the roots is -30 MPa and -45 MPa in the xylem, the water moves to the?arrow_forward1. In what groups and in what conditions are root hairs absent in root systems of plants? Why are root hairs not formed at the region of elongation and after the region of maturation? 2. Briefly explain why growth in plants is said to be indeterminate. 3. Is there a significance of compound leaves relative to strong winds? How about leaf-eating animals? Justify your answer.arrow_forward1.Explain the underlying mechanism in the opening and closing of a stomate. 2.How does oxygen get to the different parts of the plant? 3.Explain countercurrent flow. How does it help make the fish gill the most efficient respiratory organ? 4.In what form does most of the carbon dioxide travel in the blood? How and where is thismolecule produced?arrow_forward
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