Test your knowledge of the five major classes of plant hormones (auxins, cytokinins, gibberellins, abscisic acid, ethylene) by matching one hormone to each lettered box. (Note that some hormones will match up to more than one box.)
To complete: The given map of the five major classes of plant hormones.
Concept introduction:
Plant hormones are chemical messengers that are produced in trace amounts, but profoundly affect the growth and development of a plant. These include auxins, cytokinins, gibberellins, abscisic acid and ethylene.
The plant hormones perform various functions such as promoting growth, breaking dormancy, mediating fruit ripening and providing tolerance to stress.
Explanation of Solution
Pictorial representation: Fig.1 shows the completed map representing the five major classes of plant hormones.
Fig.1: The five major classes of plant hormones.
(a)
Correct answer: Auxin.
Explanation: Auxins are a group of plant hormones that promotes cell elongation. They are produced by the apical meristems of shoot and root. They promote the growth of root and shoot of the plant. Hence the correct answer is auxin.
(b)
Correct answer: Gibberellins.
Explanation: The gibberellins are a group of plant hormones that stimulate the elongation of stem by promoting cell elongation. Hence the correct answer is gibberellins.
(c)
Correct answer: Auxin.
Explanation: Auxin is produced by the apical bud of the shoot and functions to inhibit the growth of axillary buds, a phenomenon called apical dominance. Hence, the correct answer is auxin.
(d)
Correct answer: cytokinin.
Explanation: The cytokinins are a group of plant hormones that stimulate rapid cell division in roots and shoots of the plant. It also promotes the growth of lateral buds, thereby nullifying the effects of auxin. Hence, the correct answer is cytokinin.
(e)
Correct answer: Auxin.
Explanation: In addition to cell elongation, the auxins also function to retard the abscission of leaves. It also plays a crucial role in nullifying the effects of ethylene. Hence, the correct answer is auxin.
(f)
Correct answer: Ethylene.
Explanation: Ethylene is a gaseous hormone that promotes ripening of fruit and abscission of leaves from trees. Hence, the correct answer is ethylene.
(g)
Correct answer: Gibberellin.
Explanation: The gibberellin is a plant hormone that promotes the germination of seed. It inhibits seed dormancy by nullifying the effects of abscisic acid. Hence the correct answer is gibberellin.
(h)
Correct answer: Abscisic acid.
Explanation: The abscisic acid is a plant hormone that is involved in the stress responses. It inhibits growth, promotes seed dormancy during winter or periods of drought. Hence, the correct answer is abscisic acid.
Want to see more full solutions like this?
Chapter 33 Solutions
CAMPBELL BIOLOGY:CONCEPTS+CONNECTIONS
- If you wanted to reduce the difference between peak and trough levels that occur with repeated administration of a drug, how would you adjust the dose and dose interval without changing the plateau concentration (plateau is the average of peak and trough levels)? Select your answers for both dose and interval. Hint: It may be helpful to think about this problem using an example such as food. How would you eat if you wanted to maintain very steady hunger/satiety levels without changing your total caloric intake? Options: A. Dose; Increase dose B. Dose; Decrease dose C. Dose; Do not change dose D. Interval; Increase the interval between doses (give the drug less frequently) E. Interval; Decrease the interval between doses (give the drug more frequently) F. Interval; Do not change the intervalarrow_forwardWhat percentage of a drug is eliminated after 4 half-lives? Please round to the nearest percent. Show the matharrow_forwardBriefly explain the 6 domain of interprofessional collaboration: Role clarification, Team functioning, Interprofessional communication, Patient/client/family/community-centered care, Interprofessional conflict resolution, Collaborative leadership. Provide a specific negative events that nursing student would observe in a clinical setting for each domain.arrow_forward
- what is an intermittent water course and what kind of fish habitat it would providearrow_forwardwhy are native freshwater mussels are an important part of great lakes ecosystemarrow_forwardwhat morphological features differentiate the lamprey species and other species in the great lakesarrow_forward
- There are a wide range of therapeutic applications available as options for patients. Medical professionals should be aware of these applications so they can make informed recommendations to patients. To gain a better understanding of some therapeutic applications and how they are related to RNA and mRNA, research long non-coding RNA. Respond to the following in a minimum of 175 words: What is lncRNA and what does it do? How does IncRNA differ from mRNA? What are some therapeutic applications associated with lncRNA? Think about possible future uses of this application. What are the advantages and disadvantages of this application and its continued use?arrow_forwardfour fish or mussel species that are native to the great lakesarrow_forwardThere are a wide range of therapeutic applications available as options for patients. Medical professionals should be aware of these applications so they can make informed recommendations to patients. To gain a better understanding of some therapeutic applications and how they are related to RNA and mRNA, research long non-coding RNA. Respond to the following in a minimum of 175 words: What is lncRNA and what does it do? How does IncRNA differ from mRNA? What are some therapeutic applications associated with lncRNA? Think about possible future uses of this application. What are the advantages and disadvantages of this application and its continued use?arrow_forward
- four physial characteristics of a fish or a mussel that would help you identify it to a speciesarrow_forwarddescribe what you would do in this situation, you are working ona. river and it will take 20 minutes by boat to get back to the field truck, you are 1 hour from finishing the field work on the last day of field trip. you hear thunder int he dsitnace, what did you do?arrow_forwardunu grow because auxin is still produced in the tip to Another of Boysen and Jensen's experiments included the use of mica, explain why one of the shoots was able to show phototropism and the other was not. Mica Wafer Ligh c. They then t but this time permeable n shoot. Why phototropis Light Mica Wafer Coleoptile tips Tips removed: agar Explain why the shoo direction after the ag the cut shoot, even tarrow_forward
- Biology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage LearningBiology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage Learning
- Biology: The Unity and Diversity of Life (MindTap...BiologyISBN:9781337408332Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa StarrPublisher:Cengage LearningBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxBiology: The Unity and Diversity of Life (MindTap...BiologyISBN:9781305073951Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa StarrPublisher:Cengage Learning