Answered: Which of the following evolutionary…

Which of the following evolutionary mechanisms results in the evolution of adaptations? Gene flow Genetic Drift Natural Selection Mutation

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter19: Population Genetics And Human Evolution

Section: Chapter Questions

Problem 19QP: Measuring Genetic Diversity in Human Populations The theory of natural selection has been summarized...

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Question 18 When fitness is lower at both extremes of phenotypic variation for a trait (e.g., the very largest and very smallest beaks in a bird population) than for the median value in a population, the predominant evolutionary force at work is called Group of answer choices Only 1 correct answer phenotypic selection stabilizing selection directional selection phenotypic choice
QUESTION 46 Which of the following statements about speciation is correct? a. Natural selection chooses the reproductive barriers for populations b. It always takes millions of years for speciation to occur c. The goal of natural selection is speciation d. Speciation is a process in which members become reproductively isolated into their own group.
Question A: From an evolutionary point of view, why can't we say that the human species is the most evolved? Briefly explain in your own words based on a concrete example
Question 20 How do new species arise, according to the theory of natural selection? when an old species goes extinct, a new species arises to take its place ) individuals in a population pass on new traits they have acquired during their lifetimes (3) two new species spontaneously branch off from ancestor populations from time to time if a population is reproductively isolated in a sufficiently different ecosystem for an extended period of time, it will develop adaptations that will eventually render it incapable of interbreeding with its host population
Question 4: What percentage or Americans believe that evolution does not occur and that humans and all other living things have only ever existed in their present form? A. Less than 20%B. Between 20% and 40%C. Between 40% and 60%D. Between 60% and 80%E. More than 80%
QUESTION 17 The current rate of extinction is ____ , compared to the historical background extinction rate. a. almost 1,000 times lower b. slightly less c. about the same d. up to 1,000 times higher e. fluctuating wildly
QUESTION 16 You are examining a beloved population of trillium in the backyard of your childhood home. You recall as a child that flowers were bright white. As you return to the population you note that many (but not all) of the flowers have a faint purple vertical stripe in the middle of each petal. List each of Darwin’s postulates and what must be true about your population if it has undergone evolution by natural selection for petal color.
QUESTION 30 Misconceptions (false-truths accepted by the general public) are a constant problem in terms of evolution education. Of the following statements, which one is actually TRUE? a. Natural selection only acts directly on phenotypes of individuals. b. Populations must evolve to avoid and prevent extinction of the species. c. Populations evolve to perfection such that all traits an individual has maximizes all aspects of fitness. d. A new trait cannot evolve within a population while undergoing selection favoring a different trait.
QUESTION 22 Tiktaalik and Archaeopteryx are very important transitional forms. They provide evidence for evolution through examples of: a. microevolution b. macroevolution c. migration d. speciation
QUESTION 9 Recent genetic research indicates that ____ or more individuals are needed for an endangered species to maintain its capacity for biological evolution. a. 100 b. 1,000 c. 10 d. 100,000 e. 10,000
QUESTION 11 You are examining a new population that has recently migrated to and colonized a new island. Which of the following characteristics would you expect to see in your population? a. The new population will likely experience genetic drift related issues related to the founder effect. b. The new population will suffer more the effects of mutation because this is a bottleneck event. c. The new population will have high levels of heterozygosity and allelic richness. d. The new population will most likely have the same allele frequencies as the original population.
Question 2 please: Does natural selection always lead to evolution? Use the information in this activity to answer that question. What more might we need to know to fully answer it?