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Concept explainers
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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Chapter 35 Solutions
Campbell Biology, Books a la Carte Edition (11th Edition)
- But 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_forwardWhat is the advantage of closed stomata when water is in short supply?arrow_forwardExplain why and how stomata open.arrow_forward
- What causes the opening and closing of guard cells of stomata duringtranspiration?arrow_forwardThe 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_forwardHow is opening and closing of stomata regulated?arrow_forward
- Stomata are openings on plants that allow for gas exchange. True Falsearrow_forwardA) The concentration of CO2 is lower inside a plant cell than in the atmosphere (outside the cell). In your own words, describe how the CO2 levels are kept low inside the plant cell and explain why this is necessary. Assume stomata are open. B) Regarding the situation presented in Part A and assuming that the stomata of the plant leaves are closed, would this favour the induction of photorespiration in a C3 plant? Explain. Make reference to relevant molecule or molecules as needed. Please clearly label your responses as A and Barrow_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
- Closed stomata ________. a. limit gas exchange b. permit water loss c. prevent photosynthesis d. absorb lightarrow_forwardWhen stomata open, what occurs?______ Water vapor is lost to the external environment, increasing the rate of transpiration Water vapor is lost to the external environment, decreasing the rate of transpiration Water vapor enters the spaces in the mesophyll increasing the rate of transpiration Water vapor enters the spaces in the mesophyll decreasing the rate of transpiration.arrow_forwardClimate change due to the increasingly rapid levels of greenhouse gases (particularly CO2) in our atmosphere is a serious current global concern. How might Stomatal density serve as a bio-indicator for monitoring the response of plants to changes in greenhouse gas concentrations in the future? (Hint: How does Stomatal density vary with CO2 concentration?)arrow_forward
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