Biological Science (7th Edition)
7th Edition
ISBN: 9780134678320
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Greg Podgorski, Emily Taylor, Jeff Carmichael
Publisher: PEARSON
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Chapter 23, Problem 15PIAT
PROCESS OF SCIENCE The data in the graphs are from two of the 22 forest fragments studied by the researchers: 7 with toucans present, 15 with toucans absent. Why do you think the researchers bothered to study so many forest fragments?
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Clausen and colleagues proposed two hypotheses to explain this variation within a species: (1) There are genetic differences between populations of plants found at different elevations. (2) The species has developmental flexibility and can assume tall or short growth forms, depending on local abiotic factors. If you had seeds from yarrow plants found at low and high elevations, what experiments would you perform to test these hypotheses?
Select the three experiments.
Can you please explain this question and how to tell read these trees?
, make a diagram illustrating the evolution of a domesticated crop (preferably one that is cultivated or grown in your area). You may use any medium (crayons, colored pencils, etc.) which is readily available to you. Your output will be evaluated based on content (Does the diagram show information that is valuable and relevant to the theme?), organization (Does the diagram present information in a clear and orderly manner?), presentation (Are the layout and design of the diagram attractive and neat?) and graphics (Do the illustrations creatively and adequately support the information that the diagram intends to relay? Are the illustrations big enough to be identified from at least 1 meter away?).
Chapter 23 Solutions
Biological Science (7th Edition)
Ch. 23 - PROCESS OF SCIENCE In what sense is the...Ch. 23 - 2. Why isn’t inbreeding considered an evolutionary...Ch. 23 - 4. True or false? Gene flow can either increase or...Ch. 23 - 6. In the 1700s and 1800s, royalty in Europe often...Ch. 23 - MODEL Draw a small concept map (BioSkllls 12 )...Ch. 23 - 9. QUANTITATIVE In humans, albinism is caused by...Ch. 23 - Prob. 10TYPSSCh. 23 - Are toucans important to tropical forests? Human...Ch. 23 - QUANTITATIVE Toucans can eat fruits with large...Ch. 23 - 13. Do these data illustrate directional,...
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- I need some help with this questionarrow_forwardA consortium of dairy and beef farmers has hired you to study the evolutionary origins of domestic cattle. They particularly want to know whether the humped zebu cattle of Asia and the cattle of Africa are derived from different species of wild cattle than European breeds. Outline a complete research program to study this question. Describe the sequence of steps you would need to do, what kind of data you would collect, and the methods you could use to evaluate possible trees and branches.arrow_forwardCan you label this diagram entirely, I am having a hard time depicting parts on this diagram because it looks different then the online diagram, thank you!arrow_forward
- Imagine that you wanted to know if speciation rate in plant groups is linked to whether the plants are pollinated by bees or hummingbirds. To do this, you identified 20 genera of angiosperms that contained species pollinated by both types of animals. There were substantially more species in the groups that were pollinated by bees. Which of the following conclusions are most consistent with your data? A. Hummingbirds promoted speciation less than did bees. B. Hummingbirds promoted speciation more than did bees. C. Each genus should first be split into two new genera. D. The rates of speciation are independent of pollinator type.arrow_forwardGreg is forming a hypothesis for a science experiment. His current hypothesis is: "How many hours of sunlight per day is best for dandelion flowers?" What is wrong with Greg's current hypothesis? (Choose all that apply) It should test a wider variety of flowers. It isn't written in the form of a statement. It doesn't provide enough evidence. It doesn't define an independent variable It is too broad, and not testable. It doesn't define a dependent variablearrow_forwardClausen and colleagues proposed two hypotheses to explainthis variation within a species: (1) There are genetic differencesbetween populations of plants found at different elevations.(2) The species has developmental flexibility and can assumetall or short growth forms, depending on local abiotic factors.If you had seeds from yarrow plants found at low and highelevations, how would you test these hypotheses?arrow_forward
- Please solvearrow_forwardIt is a multiple choice question, but please give explanation.arrow_forwardFigure 1.15 Example of error bars in a graph. This graph was adapted from the peacock butterfly research described in Section 1.5. The researchers recorded the number of times each butterfly flicked its wings in response to an attack by a bird. The squares represent average frequency of wing flicking for each sample set of butterflies. The error bars that extend above and below the dots indicate the range of valuesthe sampling error. Figure It Out: What was the fastest rate at which a butterfly with no spots or sound flicked its wings?arrow_forward
- What is the difference between parapatric speciation and sympatric speciation?I understand that it has to do with habitat but I am having trouble conceptualizing the differences. A simplistic analogy or metaphor to help understand the differences would be very appreciated as I am a disabled student. Thank You.arrow_forwardFruit scientists are trying to determine the role of the pectinase (p) gene in a plant’s ability to tolerate cold conditions. The table shows each of three possible fruit tree genotypes and the percentage of fruit produced at different temperature ranges. Which of the following statements best describes the evolutionary concept illustrated by this example? A. Homozygous genotypes increase fitness in a population. B. Hybrid plants are known to have a disadvantage over homozygous genotypes. C. Natural selection selects against the recessive gene and for the dominant gene. D. Certain phenotypic variations can significantly increase fitness of the organism in particular environments.arrow_forwardOne problem with this line of criticism is that it is difficult to distinguish good forms of manipulating nature from unacceptable ones. Some critics of GMOs argue that we ought to leave species as we find them, and that it is the cross-species transfers of genetic material involved in some GMOs that make them unacceptable. One problem with this objection is that similar transfers have occurred in nature—from basic plant genetics to the long-term patterns of evolution. Please explain what does it meanarrow_forward
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