BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
3rd Edition
ISBN: 9781260670929
Author: Hoefnagels
Publisher: MCG CUSTOM
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Chapter 12.3, Problem 1MC
Summary Introduction
To determine:
Adaptations and the reason for their frequent occurrence in a population.
Introduction:
The organism of the same species differs from each other in a number of ways. In nature, there is a competition amongst the individuals of a population for limited
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Chapter 12 Solutions
BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
Ch. 12.1 - What are two ways to define evolution?Ch. 12.1 - Prob. 2MCCh. 12.2 - Prob. 1MCCh. 12.2 - What did Darwin observe that led him to develop...Ch. 12.2 - What is modern evolutionary synthesis?Ch. 12.3 - Prob. 1MCCh. 12.3 - Prob. 2MCCh. 12.3 - Prob. 3MCCh. 12.3 - Prob. 4MCCh. 12.4 - Prob. 1MC
Ch. 12.4 - Why doesnt Hardy-Weinberg equilibrium occur in...Ch. 12.5 - Distinguish among directional, disruptive, and...Ch. 12.5 - How can natural selection maintain harmful alleles...Ch. 12.6 - Prob. 1MCCh. 12.6 - Prob. 2MCCh. 12.7 - How do mutations affect an organisms phenotype?Ch. 12.7 - South china tigers once had two color patterns...Ch. 12.7 - Prob. 3MCCh. 12.7 - Prob. 4MCCh. 12 - Microevolution applies to changes that occur a....Ch. 12 - Biological evolution describes how ____ change...Ch. 12 - Prob. 3MCQCh. 12 - What is the most accurate way to explain the...Ch. 12 - Suppose that after an environmental change, foxes...Ch. 12 - Huntington disease is caused by a rare, lethal,...Ch. 12 - A population of 100 sea stars is in Hardy-Weinberg...Ch. 12 - Prob. 8MCQCh. 12 - Darwin observed that different types of organisms...Ch. 12 - Which of the following processes is nonrandom? a....Ch. 12 - Prob. 1WIOCh. 12 - Prob. 2WIOCh. 12 - Explain how understanding evolution is important...Ch. 12 - Write a paragraph that describes the connections...Ch. 12 - Jellyfish Lake, located on the Pacific island of...Ch. 12 - Prob. 6WIOCh. 12 - Explain how harmful recessive alleles can persist...Ch. 12 - Prob. 8WIOCh. 12 - Describe the competing selective forces acting on...Ch. 12 - Some researchers suggest that a giraffes long neck...Ch. 12 - Burning Question 12.1 explains why an organism...Ch. 12 - Review the Survey the Landscape figure in the...Ch. 12 - Describe situations in which the five mechanisms...Ch. 12 - Prob. 3PIT
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- What is fitness according to evolution?arrow_forwardHow does natural selection influence adaption?arrow_forwardIf mutation introduces a new allele into a population, what will happen to the frequency of the original alleles over generations? (Assume all alleles are adaptive.) a) The mutant allele will eventually be lost from the population. O b) Frequency of the original alleles will remain the same. c) Frequency of the original alleles will decrease. d) Frequency of the original alleles will increase.arrow_forward
- What is disruptive selection ?arrow_forwardWhat is a adaptive traitarrow_forwardWhich of the following promotes adaptive evolution in populations? A)High genetic diversity B)Selection pressure for an environmental factor that is changing C)Greater survival and reproduction in organisms with inherited traits D)All of the above At what rate do adaptations occur in populations? A)Adaptations occur slowly, due to very low mutation rates. B)Adaptations occur quickly, due to the ability of organisms to quickly acquire traits from their environment. C)Adaptation rates can be fast when selection pressures are strong. D)Adaptation rates are always slow, due to genetic drift. Gene flow among populations results in which impact on adaptation? A)It increases the occurrence of adaptation by introducing new genes. B)It slows the process of adaptation by introducing alleles that keep the population from being dominated by the alleles best suited for the environment. C)It increases the occurrence of adaptation by moving traits acquired…arrow_forward
- Which statement illustrates the connection between natural selection and overreproduction of a population? a) populations vary in their inherited traits. b) species produce more offspring than can survive in the environment. c) individuals with inherited traits that promote survival tend to have more surviving offspring. d) individuals with traits that do not enhance survival cannot reproduce.arrow_forwardHow is variation different from adaptation? * Variations are physical or behavioral traits that make an organism better suited to its environment while adaptation comes from random mutations. no answer Variation is a difference within an individual organism from the rest of the population. An adaptation is a feature that helps an organism survive in its environment. Adaptation is a difference within an individual organism from the rest of the population. A variation is a feature that helps an organism survive in its environment. Variation is always caused by mutation while adaptation is a heritable trait. Which of the following BEST explains Darwin's observation on populations of various species that seemed well-suited to their environment? * Species had been introduced to particular areas by humans on purpose. no answer Species might be able to adapt to their surroundings over time. The species Darwin saw were all related to each other. Some environments rarely ever change.arrow_forwardWhich of the following is correct concerning adaptations? (Choose one.) Group of answer choices a)They always increase an organism's ability to survive better than other individuals in the population. b)They can increase an organism's ability to survive better or reproduce better than other individuals, but not both at the same time. c)They increase an organism's ability to reproduce better than other individuals in the population, in a given environment. d)They result from any mechanism of evolution.arrow_forward
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