Bio 121 Campbell Biology Truman College
17th Edition
ISBN: 9781323670637
Author: Urry, Cain
Publisher: PEARSON
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Chapter 36, Problem 10TYU
SCIENTIFIC INQUIRY • INTERPRET THE DATA A Minnesota gardener notes that the plants immediately bordering a walkway are stunted compared with those farther away. Suspecting that the soil near the walkway may be contaminated from salt added to the walkway in winter, the gardener tests the soil. The composition of the soil near the walkway is identical to that farther away except that it contains an additional 50 mM NaCl. Assuming that the NaCl is completely ionized, calculate how much it will lower the solute potential of the soil at 20°C using the solute potential equation:
Ψs= -iCRT
where i is the ionization constant (2 for NaCl), C is the molar concentration (in mol/L), R is the pressure constant [R = 0.00831 (L • MPa)/(mol • K)],and T is the temperature in Kelvin (273 + °C).
How would this change in the solute potential of the soil affect the water potential of the soil? In what way would the change in the water potential of the soil affect the movement of water in or out of the roots?
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Observation: I want to know what effect salt has on the growth of grass. So I measure out 3 equal-sized squares of grass out the back of the Green Building. The first square of lawn I water with 5 liters of pure water from a watering can every day. The second square of lawn I water with 5 liters of pure water with 2 grams of salt mixed in, every day. The third square of lawn I water with 5 liters of pure water with 4 grams of salt mixed in, every day. I measure the height of the grass after 14 days and note the following observations. The first square is green and 15 cm high. The second square is greeny-yellow and 6 cm high. The third square is yellowy-brown and looks dead and is only 2cm high. What could we infer about the effect salt has on the growth of grass?
SCIENTIFIC INQUIRY • INTERPRET THE DATA A Minnesotagardener notes that the plants immediately bordering a walkwayare stunted compared with those farther away. Suspectingthat the soil near the walkway may be contaminated from saltadded to the walkway in winter, the gardener tests the soil. Thecomposition of the soil near the walkway is identical to thatfarther away except that it contains an additional 50 mM NaCl.Assuming that the NaCl is completely ionized, calculate howmuch it will lower the solute potential of the soil at 20°C usingthe solute potential equation:ΨS = -iCRTwhere i is the ionization constant (2 for NaCl), C is themolar concentration (in mol/L), R is the pressure constant[R = 0.00831 (L · MPa)/(mol · K)], and T is the temperature inKelvin (273 + °C).How would this change in the solute potential of the soilaffect the water potential of the soil? In what way would thechange in the water potential of the soil affect the movementof water in or out of the roots?
Please answer the first question
Chapter 36 Solutions
Bio 121 Campbell Biology Truman College
Ch. 36.1 - Why is long-distance transport important for...Ch. 36.1 - Some plants can detect increased levels of light...Ch. 36.1 - WHAT IF? If you prune a plant's shoot tips, what...Ch. 36.2 - If a plant cell immersed in distilled water has a...Ch. 36.2 - Prob. 2CCCh. 36.2 - How would the long-distance transport of water be...Ch. 36.2 - Prob. 4CCCh. 36.3 - Prob. 1CCCh. 36.3 - WHAT IF? Suppose an Arabidopsis mutant lacking...Ch. 36.3 - MAKE CONNECTIONS How are the Casparian strip and...
Ch. 36.4 - Prob. 1CCCh. 36.4 - Prob. 2CCCh. 36.4 - WHAT IF? If you buy cut flowers, why might the...Ch. 36.4 - Prob. 4CCCh. 36.5 - Prob. 1CCCh. 36.5 - Prob. 2CCCh. 36.5 - Prob. 3CCCh. 36.5 - WHAT IF? Apple growers in Japan sometimes make a...Ch. 36.6 - How do plasmodesmata differ from gap junctions?Ch. 36.6 - Prob. 2CCCh. 36.6 - WHAT IF? Suppose plants were genetically modified...Ch. 36 - How did the evolution of xylem and phloem...Ch. 36 - Is xylem sap usually pulled or pushed up the...Ch. 36 - Prob. 36.3CRCh. 36 - Prob. 36.4CRCh. 36 - Prob. 36.5CRCh. 36 - By what mechanisms is symplastic communication...Ch. 36 - Prob. 1TYUCh. 36 - Prob. 2TYUCh. 36 - Prob. 3TYUCh. 36 - Photosynthesis ceases when leaves wilt, mainly...Ch. 36 - Prob. 5TYUCh. 36 - A plant cell with a of -0.65 MPa maintains a...Ch. 36 - Compared with a cell with few aquaporin proteins...Ch. 36 - Prob. 8TYUCh. 36 - EVOLUTION CONNECTION Large brown algae called...Ch. 36 - SCIENTIFIC INQUIRY INTERPRET THE DATA A Minnesota...Ch. 36 - SCIENTIFIC INQUIRY Cotton plants wilt within a few...Ch. 36 - WRITE ABOUT A THEME: ORGANIZATION Natural...Ch. 36 - Prob. 13TYU
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- 2) Name and describe the three types of compartments found in plants in terms of water relations. How do these relate to the three different routes that an ion can take as it moves from the soil and through plant tissue?arrow_forward3) A soil bacteria wishes to open a health spa where the air is not too dry but the premises don't flood frequently either. She is hoping for a soil with a relative humidity between 50-60%. A lawyer acquaintance (a real fungus) is trying to sell her some property. He boasts that the area has a year-round matric potential of about -6.5 MPa, an electrical conductivity (in the pore-water) of 5 dS/m, and a comfortable temperature of 15 oC. The hard-sell lawyer is pressuring her for a quick decision. Does the property meet her requirements?arrow_forwardAnswer options are in greyarrow_forward
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