Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Which of the following is Not required for Natural Selection to occur with a biological population?
A. Not all offspring survive to reproduce
B.Individuals is the population with some phenotypic variants must have higher fitness on average
C. Individuals with one phenotype must always have more offspring than individuals with other phenotypes
D. The
E. Variation in the phenotypes of organisms within a population
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- Natural Selection: What are the necessary conditions? Based on this graph, which of the following statements is true? (hint: there may be more than one correct answer) A. Offspring plate count is similar to parent. 25- 20- B. Offspring plate count is unrelated to parent. 15- 10- C. Plate count is heritable. 10 15 20 25 D. Plate count is not heritable. Avg. Plate Count for Parents Е. None of the above is true. Avg. Plate Count for Offspringarrow_forward1. The diagram shows the population curve (y-axis) vs time (x-axis). Which line/curve best describes the theory of natural selection of Charles Darwin? 2. The diagram shows the population curve (y-axis) vs time (x-axis). Which curve represents the scenario described by Thomas Malthus "the populations with unlimited natural resources grow very rapidly, after which population growth decreases as resources become depleted". 3. The diagram shows the population curve (y-axis) vs time (x-axis). Which curve best represents the growth of bacteria? 4. The diagram shows the population curve (y-axis) vs time (x-axis). Which line/curve acts as a moderating force in the growth rate by slowing it when resources become limited and stopping growth once it has been reached.arrow_forwardIn marine iguanas males are much larger than females and fight with one another for access to areas that are preferred by females. What type of evolutionary force is causing the increase in male size? Group of answer choices A. disruptive (natural) selection B. intrasexual selection C. disruptive (natural) selection D. stabilizing (natural) selection E. intersexual selectionarrow_forward
- In many birds males display to females at perch sites. Females visit multiple perch sites, watch the displays, and then mate with one of the males. What type of evolutionary force is acting on male displays? Group of answer choices A. directional (natural) selection B. intersexual selection C. stabilizing (natural) selection D. disruptive (natural) selection E. intrasexual selectionarrow_forwardWhich of the following is the MOST important characteristic of a trait for it to undergo descent with modification? A. It must be heritable. B. It must exhibit variation. C. It must exhibit phenotypic plasticity. D. Variation in the trait must be accompanied by variation in fitness.arrow_forwardA population occupies heterogeneous environments in which the fitness of some genotypes is higher in one environment and the fitness of other individuals is higher in another environment. This situation is likely to result in a. directional selection. b. stabilizing selection. c. disruptive selection. d. balancing selection.arrow_forward
- High values for heterozygosity (or expected heterozygosity) at a genetic locus in a population indicates that there is: a. A lot of genetic variation b. Little genetic variation c. A population not under HW equilibrium d. A large amount of homozygosityarrow_forwardGene flow often increases genetic diversity of populations that come together. Which of these is an example of when gene flow could reduce genetic diversity if two populations (Population A and Population B) come together? O The offspring with parents from population A and B have low survival because they are not adapted to the environment. O Individuals from population A have an allele that is not found in population B. O Individuals from population B have an allele that is not found in population B O Population A only has homozygous recessive alleles and population B only has homozygous dominant alleles.arrow_forwardHardy Weinberg equilibrium (HWE) describes a situation in which the relative frequencies of alleles do not change over generations. which of the following could prevent HWE from being maintained? A. New mutations B. All individuals reproducing equally C. Random mating D. No individuals entering the populationarrow_forward
- Lamarck's theory of inheritance of acquired characteristics did NOT include which of the following ideas? Select one: a. The environment plays a role in selecting favourable characteristics b. Physical characteristics acquired during a lifetime can not be passed to offspring c. Organisms can change during their own lifetime d. Physical activities can change organisms O O Oarrow_forward1. Fitness is, most correctly, a technical term. What does it mean? What two things do you suppose govern the rate of evolution by natural selection? Explain how Darwinian evolution can decrease and increase the frequency of an allele (or a more complex heritable trait, for that matter).arrow_forwardWhich of the following statements most accurately describes the effects of genetic drift on a population? a. Populations of the same size will follow the same evolutionary trajectory when evolving due to drift. b. Genetic drift has the potential to drive evolution in all populations. c. Allele frequencies in a population of infinite size will ultimately drift to fixation or loss. d. The loss of otters in California due to excessive hunting cause a founder effect.arrow_forward
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