Concepts of Biology
1st Edition
ISBN: 9781938168116
Author: Samantha Fowler, Rebecca Roush, James Wise
Publisher: OpenStax College
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Chapter 11, Problem 15CTQ
If a person scatters a handful of plant seeds from one species in an area, how would natural selection work in this situation?
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The domestication or breeding of animals to have as pets, livestock on farms, or for work purposes is a form of artificial selection. Charles Darwin used these practices to support his theory of species change by natural selection. How is artificial selection similar to natural selection?
When animals with favorable traits are bred with animals with unfavorable traits, the offspring will have favorable traits, so breeders were changing species by removing certain traits.
For artificial selection to work, only the strong survive to reproduce.
By breeding animals with specific traits, breeders were able to produce a wide variety of breeds within a short period of time.
Artificial selection involves breeding two different species and determining if a hybrid organism can be produced.
How does competition influence natural selection? Is the presence of competitors a selective force?
In your own words, how does Competition and selection support natural selection? Use at least 1 example from the Beaks of Finches lab in your answer.
Chapter 11 Solutions
Concepts of Biology
Ch. 11 - Figure 11.7 Do you think genetic drift would...Ch. 11 - Which scientific concept did Charles Darwin and...Ch. 11 - Which of the following situations will lead to...Ch. 11 - What is the difference between micro- and...Ch. 11 - Population genetics is the study of ________. a....Ch. 11 - Galapagos medium ground finches are found on Santa...Ch. 11 - In which of the following pairs do both...Ch. 11 - The wing of a bird and the arm of a human are...Ch. 11 - The fact that DNA sequences are more similar in...Ch. 11 - Which situation would most likely lead to...
Ch. 11 - What is the main difference between dispersal and...Ch. 11 - Which variable increases the likelihood of...Ch. 11 - The word “theory” in theory of evolution is best...Ch. 11 - Why are alternative scientific theories to...Ch. 11 - If a person scatters a handful of plant seeds from...Ch. 11 - Explain the Hardy-Weinberg principle of...Ch. 11 - Describe natural selection and give an example of...Ch. 11 - Why do scientists consider vestigial structures...Ch. 11 - Why do island chains provide ideal conditions for...Ch. 11 - Two species of fish had recently undergone...Ch. 11 - How does the scientific meaning of “theory” differ...Ch. 11 - Explain why the statement that a monkey is more...
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- Natural selection and artificial selection or selective breeding can both cause changes in animals and plants. The difference between the two is that natural selection happens naturally, but selective breeding only occurs when humans intervene. Changes in genetic traits have occurred over generations through both natural selection and selective breeding although the occur through different means. What characterizes only artificial selection? Choose all that apply. A) chickens that lay larger eggs are favored B) selection increases the chances of surviving C) selection make a species stronger and fit for survival D) selection favors the desired characters in the new organismsarrow_forwardWhich of the following is NOT an essential component of Darwin's theory of natural selection? a) natural selection results in a population that is adapted to its environment b) use or disuse of a structure causes changes that are passed onto the next generation c) more offspring are produced than the environment can support d)heritable variation exists in populationsarrow_forwardA farmer uses an herbicide called triazine to control pigweed in his field. Initially, the triazine works well and almost all the pigweed dies; but after several years, the farmer sees more and more pigweed. Which of these is the best explanation for what happened? Group of answer choices: Natural selection favored triazine-resistant pigweed, which was more likely to survive and reproduce. Some pigweed plants adapted to become resistant to triazine and passed the trait to their progeny. Natural selection caused the pigweed to mutate, creating a new triazine-resistant species. The herbicide company lost its triazine formula and started selling lower-quality triazine. Triazine-sensitive pigweed is less efficient at photosynthesis.arrow_forward
- A farmer uses DDT to kill insects in his field. The first year nearly all of the insects were killed. By the fourth year, however, nearly all of the insects survived the DDT treatment. Explain the process of natural selection in this population of insects. Include these words - mutation, phenotype, variation, resistance, adaptation, and differential survival.arrow_forwardIf a species of ground finch with variation in beak size suddenly had to all compete for large hard seeds, what kind of selection would occur on the species?arrow_forwardDescribe how natural selection can create new species through reinforcement.arrow_forward
- Which statement is accurate about natural selection? It is a biological process that prevents species from adapting to significant changes in their environments. It is a biological process that leads a population to have a widespread expression of an advantageous trait. It is a biological process that allows a population to have a competitive advantage in many environments. It is a biological process that causes certain traits to be expressed less with each subsequent generation.arrow_forwardWhich of the following best states a condition which promotes natural selection of a species? A)One baby albino alligator, from a nest of 20 eggs, hatches in the Florida Everglades. B)The population of moths in a forest increased from 100 to 150 members. C)An ocean ecosystem consists of more algae than fish species. D)A female cat has a litter of 5 kittens instead of 6.arrow_forwardNatural selection can sometimes help improve human health and other times is ineffective at improving human health. Explain one example of how selection has helped human health, and explain one example of how selection cannot help human health (including giving a reason why selection was or was not effective for each case). You can give hypothetical examples if you explain them well. A couple of sentences answer is fine.arrow_forward
- What did the Scottish geologist James Hutton claim about a possible evolutionary mechanism similar to natural selection (many years before Charles Darwin and Alfred Russel Wallace)? selection for heritable variation could improve neither varieties nor species of plants and animals artificial selection of crops and livestock improves plants and animals more than natural selection only natural selection, not artificial selection, could lead to improved plant and animal species only artificial selection, not natural selection, could lead to improved plants and animal species selection for heritable variation could improve varieties, but not species, of plants and animalsarrow_forwardWhat are the three basic requirements for natural selection to operate?arrow_forwardYou are asked to assess whether a population of endangered salamanders can adapt to warming climate in their preferred habitat. The salamanders vary at a locus that determines adaptation to temperature, and the warming climate creates selection favoring one of two alleles at that locus. Drawing on what you know about natural selection and genetic drift, what information would you need to know about the salamanders to determine whether the allele that improves their adaptation to warmer climates will become fixed in the population? Strictly no plagiarism.arrow_forward
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