CAMPBELL BIO-MOD.MASTERING ACCESS
1st Edition
ISBN: 9780135351789
Author: Urry
Publisher: PEARSON C
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Chapter 35.4, Problem 2CC
Summary Introduction
To explain: The reason why stomata need to be closed, but lenticels do not.
Concept introduction:
The woody plants possess an outer hard layer called periderm in the trunks of plants. The periderm is derived from the cork cambium, a component of lateral meristem. This layer protects trees from microbial attack and insect invasions. Lenticels are loose aggregate of cells in the periderm. They help in gaseous exchange between the atmosphere and the living tissue inside the bark.
The stomata are openings in the epidermis of the leaf that allow exchange of gases. These are also the sites where the maximum evaporation takes place. The stomata are surrounded by guard cells that control their opening and closing.
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Stomata and lenticels are both involved in exchange ofCO2 and O2. Why do stomata need to be able to close,but lenticels do not?
Stomata can open and close in order to modulate the transpiration stream and allow for exchange of oxygen and CO2. Stomata OPEN by…
Which is true regarding regulation of stomata?
Light provides a signal leading to the pumping of K+ and Cl- out of the guard cells
Low CO2 concentration in leaves is a signal to close stomata
Abscisic Acid is a hormone that signals for stomata to open
Stomata remain open under hot, dry conditions
If guard cells are turgid (full of water), the stomatal pore is open
Chapter 35 Solutions
CAMPBELL BIO-MOD.MASTERING ACCESS
Ch. 35.1 - Prob. 1CCCh. 35.1 - WHAT IF? If humans were photoautotrophs, making...Ch. 35.1 - Prob. 3CCCh. 35.2 - Prob. 1CCCh. 35.2 - Prob. 2CCCh. 35.2 - Prob. 3CCCh. 35.3 - Prob. 1CCCh. 35.3 - Prob. 2CCCh. 35.3 - Prob. 3CCCh. 35.4 - A sign is hammered into a tree 2 m from the tree's...
Ch. 35.4 - Prob. 2CCCh. 35.4 - Would you expect a tropical tree to have distinct...Ch. 35.4 - Prob. 4CCCh. 35.5 - How can two cells in a plant have vastly different...Ch. 35.5 - Prob. 2CCCh. 35.5 - Prob. 3CCCh. 35 - Prob. 35.1CRCh. 35 - Prob. 35.2CRCh. 35 - Prob. 35.3CRCh. 35 - Whht advantages did plants gain from the evolution...Ch. 35 - Prob. 35.5CRCh. 35 - Most of the growth of a plant body is the result...Ch. 35 - Prob. 2TYUCh. 35 - Prob. 3TYUCh. 35 - The phase change of an apical meristem from the...Ch. 35 - Supposc a flower had normal expression of genes A...Ch. 35 - Prob. 6TYUCh. 35 - Which of the following would not be seen in a...Ch. 35 - Prob. 8TYUCh. 35 - EVOLUTION CONNECTION Evolutionary biologists have...Ch. 35 - SCIENTIFIC INQUIRY Grasslands typically do not...Ch. 35 - SCIENCE, TECHNOLOGY, AND SOCIETY Hunger and...Ch. 35 - WRITE ABOUT A THEME: ORGANIZATION In a short essay...Ch. 35 - SYNTHESIZE YOUR KNOWLEDGE This stained light...
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- Closed stomata ________. a. limit gas exchange b. permit water loss c. prevent photosynthesis d. absorb lightarrow_forwardClosed stomata ________. a. limit gas exchange c. prevent photosynthesis b. permit water loss d. absorb lightarrow_forwardThere is a trade-off between photosynthesis and transpiration in leaves because (a) numerous stomatal pores provide both gas exchange for photosynthesis and openings through which water vapor escapes (b) a waxy layer, the cuticle, reduces water loss (c) blue light triggers an influx of potassium ions (K+) into the guard cells (d) leaves of deciduous plants abscise as winter approaches in temperate climates (e) stomata are closed at night, although water continues to move into the roots by osmosisarrow_forward
- Stomata are openings on plants that allow for gas exchange. True Falsearrow_forwardWhat are potential outcomes when a plant's stomata close in response to heat and water stress? Select all that apply. CO2 and O2 may compete for the active site of rubisco. Photorespiration is more likely to occur. Photosynthesis is more efficient. Gas exchange comes to a halt.arrow_forwardWhat is the function of xylem vessels? A. composed of dead lignified cells connected end to end B. allows the transport of water and minerals in the upward direction C. carries the products of photosynthesis in a bidirectional movement D. composed of sieve tubes that are closely associated with companion cells to facilitate movement of materialsarrow_forward
- The stomata are tiny openings in leaves that, when open, allow water to evaporate. In what circumstances do you expect that stomata to be closed?arrow_forwardIf a plant’s stomata are made to stay open at all times, orclosed at all times, it will die. Why?arrow_forwardwhy do stomata open due to high humidity?arrow_forward
- Every 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_forwardAbout STOMATA What is the benefit of keeping them open? What it the benefit to keeping them closed? What would you expect the leaves to look like for a tree that lives in very dry conditions? What would you expect the leaves to look like for a tree that lives in very wet / very crowded conditions? Why?arrow_forwardBut how are the two types of mesophyll involved? From what I understand, CO2 enters the stomata, and then the citric acid cycle of the mitochondia in the mesophyll use the carbon atoms do produce glucose, which then goes through phloem loading and it either used or stored. My question, I guess, is how exactly are the two types of mesophyll involved? Is only one used or are both used at different times in the production of the glucose?arrow_forward
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