Campbell Biology in Focus
3rd Edition
ISBN: 9780134710679
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Rebecca Orr
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 31.3, Problem 1CC
Summary Introduction
To explain:
Why plants with mutant that produce excessive abscisic acid (ABA) are warmer than wild-types under normal, non-stressful circumstances.
Concept introduction:
ABA is a plant stress hormone that helps the plant to overcome drought conditions. It does so by helping in the closing of stomata. ABA causes water to flow out of guard cell and thus lessen its turgor. Hence, the stomata close.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Acclimatization has been one of the major obstacles to the use of tissue culture in crop improvement. Explain why this process is necessary for the ex vivo survival of tissue culture derived plants.
A series of auxotrophic mutants were isolated in Neurospora. Examination
of fungi containing these mutations revealed that they grew on minimal
medium to which various compounds (A, B, C, D) were added; growth
responses to each of the four compounds are presented in the following
table. Give the order of compounds A, B, C, and D in a biochemical
pathway. Outline a biochemical pathway that includes these four
compounds and indicate which step in the pathway is affected by each of
the mutations.
Compound
Mutation number
А в С
A
D
134
276
987
773
772
146
333
123
+ + I +
A crude extract sample was obtained from a plant and was found effective as an anti-diabetic agent in-vitro. The researcher wants to determine the appropriate lethal dose of the sample because it was intended to be administered orally. Literature studies show that plants under the same genus with the source of the crude extract has a lethal dose of 300 mg/Kg BW. Your group performed the test following the OECD Guideline 423 and used the recommended starting dose. The derived approximate LD50 was 25 mg/Kg BW.
1.With the approximate LD50 of the plant sample tested in the case, determine and interpret the TI of the sample if the ED50 is:
A. 40 mg/Kg BW
B. 18 mg/Kg BW
C. 3 mg/Kg Bw
Chapter 31 Solutions
Campbell Biology in Focus
Ch. 31.1 - Prob. 1CCCh. 31.1 - WHAT IF? If a plant has the double mutation ctr...Ch. 31.1 - Prob. 3CCCh. 31.2 - If an enzyme in field-grown soybean leaves is most...Ch. 31.2 - WHAT IF? If a plant flowers in a controlled...Ch. 31.2 - MAKE CONNECTIONS Plants detect the quality of...Ch. 31.3 - Prob. 1CCCh. 31.3 - Prob. 2CCCh. 31.3 - Prob. 3CCCh. 31.4 - Prob. 1CC
Ch. 31.4 - Chewing insects mechanically damage plants and...Ch. 31.4 - Prob. 3CCCh. 31 - The hormone that helps plants respond to drought...Ch. 31 - Prob. 2TYUCh. 31 - Prob. 3TYUCh. 31 - Prob. 4TYUCh. 31 - Prob. 5TYUCh. 31 - Prob. 6TYUCh. 31 - DRAW IT Indicate the response of Arabidopsis to...Ch. 31 - Prob. 8TYUCh. 31 - FOCUS ON EVOLUTION As a general rule,...Ch. 31 - FOCUS ON INTERACTIONS In a short essay (100-150...Ch. 31 - Prob. 11TYU
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- A crude extract sample was obtained from a plant and was found effective as an anti-diabetic agent in-vitro. The researcher wants to determine the appropriate lethal dose of the sample because it was intended to be administered orally. Literature studies show that plants under the same genus with the source of the crude extract has a lethal dose of 300 mg/Kg BW. Your group performed the test following the OECD Guideline 423 and used the recommended starting dose. The derived approximate LD50 was 25 mg/Kg BW. Why would a drug with a TI of less than 1 be considered as the primary treatment of a certain disease?arrow_forwardMany plants increase in freezing tolerance upon exposure to low nonfreezing temperatures. Rye, for instance, is killed by freezing at about -5°C, but after a period of exposure to low nonfreezing temperature can survive freezing down to about -30°C. When exposed to low temperatures, plants exhibit an increased expression of certain cold-induced genes that function to stabilize cell membranes against freeze-induced injury. The ability of an individual plant to develop freezing tolerance is best described as an example of: O Acclimation Allopatric speciation O Mutation Genetic drift OAdaptation Freeze-induced cellular dehydrationarrow_forwardMany plants increase in freezing tolerance upon exposure to low nonfreezing temperatures. Rye, for instance, is killed by freezing at about -5°C, but after a period of exposure to low nonfreezing temperature can survive freezing down to about -30°C. When exposed to low temperatures, plants exhibit an increased expression of certain cold-induced genes that function to stabilize cell membranes against freeze-induced injury. The ability of an individual plant to develop freezing tolerance is best described as an example of: Genetic drift OMutation O Allopatric speciation OAdaptation Acclimation Freeze-induced cellular dehydrationarrow_forward
- Many plants increase in freezing tolerance upon exposure to low nonfreezing temperatures. Rye, for instance, is killed by freezing at about -5°C, but after a period of exposure to low nonfreezing temperature can survive freezing down to about -30°C. When exposed to low temperatures, plants exhibit an increased expression of certain cold-induced genes that function to stabilize cell membranes against freeze- induced injury. The ability of an individual plant to develop freezing tolerance is best described as an example of: Allopatric speciation Freeze-induced cellular dehydration Adaptation Acclimation O Mutation Genetic driftarrow_forwardDescribe the use of Plant Growth regulators in Agriculture give at least 4 examplesarrow_forwardList five main groups of natural plant growth regulators. Write a note ondiscovery, physiological functions and agricultural/horticultural applicationsof any one of them.arrow_forward
- A unique aquatic plant was discovered from a lagoon in El Nido, Palawan. To determine the protein content of the plant, an adequate amount of the plant extract was acquired, and Bradford assay was performed. Determine the total protein concentration, in µg/mL, of the acquired plant extract. A bovine serum albumin (BSA) stock solution with a concentration of 250 µg/mL was used and mixtures with the following compositions and absorbance readings were prepared: Volume of BSA (mL) Volume of water (mL) Absorbance Tube # at 595 nm 1 0.00 2.00 0.000 2 0.20 1.80 0.112 3 0.40 1.60 0.225 4 0.60 1.40 0.318 5 0.80 1.20 0.432 6 1.00 1.00 0.551 The absorbance reading of the plant extract is 0.275.arrow_forwardYou are studying a biochemical pathway and isolate Neurospora mutants I, II, and III.Mutant I can grow if you supplement the medium with Z.Mutant II can grow if you supplement the medium with X, Y, or Z.Mutant III can grow if you supplement the medium with X and Z, but not with Y. Draw a biochemical pathway that shows the correct order for compounds X, Y, and Z and for the enzymes that each mutant is defective for.arrow_forwardWhat are the concepts behind osmosis and enzymatic browning in potatoes?arrow_forward
- There is a group of six or so genes, called luxlux genes, whose gene products are necessary for light formation. Given that these bacterial genes are regulated together, propose a hypothesis for how the genes are organized and regulated. Match the terms in the left column to the appropriate blanks in the sentences on the right. Terms can be used once, more than once, or not at all. Terms: metaboliozed, density, quorum sensing, state, signal amplification, inhibit, activate, detected, secrete, transcrption initiation complex, consume, operon Bacterial cells blank molecules that can be blank by other bacterial cells. Sensing the concentration of such signalling molecules allows bacteria to monitor the local blank of cells, a phenomenon called blank. There is a group of genes in the genome of the described bacterium, called luxgenes, which are organized in an blank. Reaching a certain concentration, molecules involved in this process blank the luxgenes. As a result, the…arrow_forwardArtificial leaves are beginning to be developed by biotechnology companies. Outline the basic characteristics that an artificial leaf would need to have to manufacture a sugar.arrow_forwardTannins and silica are growth-enhancing compounds in plants associated with “antixenosis”. True or Falsearrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Biology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage Learning
Biology: The Dynamic Science (MindTap Course List)
Biology
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Cengage Learning