Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 29.4, Problem 1CC
Summary Introduction
To write:
The environmental signal that roots use to achieve downward growth.
Introduction:
The root has a complex system whose main function is to anchor the plant to the soil and help in absorbing nutrients and water from the soil. The development of root is in coordination with the shoot system, which is influenced by the environmental conditions prevailing. Auxin is an important plant hormone that plays a pivotal role while working in coordination with water and nutrient supplies.
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Is there any other environmental signal that roots could use to achieve downward growth?
From an agricultural perspective, describe two advantages of vegetative propagation.
Primary xylem...
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1°) is a tissue only made up of live cells
2°) has a centrifugal differentiation in the root
3°) is a tissue present in the root
4°) is only found in woody plants
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Chapter 29 Solutions
Principles of Biology
Ch. 29.1 - Prob. 1BCCh. 29.1 - Prob. 1TYKCh. 29.2 - Prob. 1CCCh. 29.2 - Prob. 2CCCh. 29.2 - Prob. 1TYKCh. 29.2 - Prob. 2TYKCh. 29.3 - What kind of light does the active conformation of...Ch. 29.3 - Prob. 2CCCh. 29.3 - Imagine a garden that has been planted with...Ch. 29.3 - Prob. 3CC
Ch. 29.4 - Prob. 1CCCh. 29.4 - Prob. 1TYKCh. 29.5 - Prob. 1CCCh. 29.5 - In what way is systemic acquired resistance to...Ch. 29.5 - Prob. 1TYKCh. 29 - Prob. 1TYCh. 29 - Prob. 2TYCh. 29 - Prob. 3TYCh. 29 - Prob. 4TYCh. 29 - Prob. 5TYCh. 29 - Photoreceptor molecules allow plant cells to...Ch. 29 - Prob. 7TYCh. 29 - Prob. 8TYCh. 29 - Prob. 1CCQCh. 29 - Prob. 2CCQCh. 29 - Prob. 3CCQCh. 29 - Prob. 1CBQCh. 29 - How could you increase the resistance of a...
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- Contrast primary growth in roots and shootsarrow_forwardYou could prevent most of a plant's secondary growth by: Destroying the phloem portion of the vascular cambium It would require the combination of at least two of these Removing the apical or basal meristems Destroving the cork cambium Destroying the xylem portion of the vascular cambiumarrow_forwardFrom the viewpoint of the plant, can you suggest a practical reason for branch roots originating internally instead of at the surface?arrow_forward
- why is pressure higher in parts of the phloem Where sugar is being loaded than in parts were sugars been removed?arrow_forwardWhy root pressure is seen only under favorable conditions,like spring and rainy season?arrow_forwardDo mature Zea mays (monocot) stem possess residual procambium? Why?arrow_forward
- The cross-section of a woody root is shown in Figure 3. Observe and locate the center of the root and work to the outer portion. Identify and label the following: Secondary phloem Secondary xylem Primary xylem Vascular cambium Xylem rayarrow_forwardAbout the root 1°) water and nutriments are only uptaken in the piliferous zone of the root 2°) adventive roots only develop on rhizomes 3°) the root meristem is protected by a cap 4°) the root does not have nodes O Oarrow_forwardBoth cohesion-tension and root pressure are mechanisms for moving water in the xylem. What does it mean when it says that cohesion-tension pulls water, but root pressure pushes water?arrow_forward
- from the viewpoint of the plant, can you suggest a practical reason for branch roots originate internally instead of at the surface?arrow_forwardEvery winter, the cohesion of water molecules in xylem is interrupted by ice formation. What do trees do in the spring that compensates for this problem?*arrow_forwardWhat type of roots would form a “sod” or turf?arrow_forward
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