WHAT IS LIFE? ACHIEVE 1 TERM ACCESS CODE
5th Edition
ISBN: 9781319516116
Author: PHELAN
Publisher: MAC HIGHER
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Chapter 13, Problem 1MC
Summary Introduction
Introduction:
An adaptation is a feature that is common in a population because it provides some improved function. Adaptations are well fitted to their function and are produced by natural selection. Evolution is change in the heritable characteristics of biological populations over successive generations. Evolutionary processes give rise to biodiversity at every level of
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Consider global warming, a continual gradual increase in average temperatures. How might you expect this to affect natural
selection?
A.environmental changes are unpredictable, and natural selection is a random process, so it is difficult to predict outcome
B.species from warmer climates are likely to expand their ranges into higher latitudes
C.traits that increase reproductive success under warmer temperatures are likely to increase in frequency in a population
D.the stress caused by higher temperatures will increase mutation rates
Which one of these statements about fitness is most accurate?
A. Fitness is a measure of strength & health
B. Fitness may change at a population level, but is constant for an individual
C. Fitness can only be measured at the population level
D. Fitness is a measure of reproductive success
E. Fitness is an overall measurement that applies to all evolutionary mechanisms
Alfred Russel Wallace and Charles Darwin argued that evolution by means of natural selection involves all of the following steps except:
a. variation is present in all species
b. species can produce more offspring than the environment can sustain
c. all individuals within a species have equal chances to improve their fitness
d. those individuals that are more fit will survive and reproduce in the greatest numbers
e. over time, the species will evolve as the more fit individuals replace the less fit individuals
Chapter 13 Solutions
WHAT IS LIFE? ACHIEVE 1 TERM ACCESS CODE
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Darwinian fitness is a measure of a. survival. b. reproductive success. c. heterozygosity of the gene pool. d. polymorphisms in a population.arrow_forwardWhich of the following is correct (can be more than 1): Genetic drift is an important mechanism of evolution: A. when the difference in fitness between alleles is small B. when a small number of individuals found a new population C. when the difference in fitness between alleles is large D. when population size is small E. when population size is large F. during and after a population bottleneckarrow_forwardWhich of the following statements about natural selection is a misconception? a.Most species don't produce more offspring than the environment can support b.Natural selection acts on heritable variations in a population c.Natural selection involves differential reproductive success d.Natural selection occurs as a result of competition among individuals in a population e.In natural selection, traits that are favoured depend on current environmental conditionsarrow_forward
- Which of the following is the most important trait in terms of evolutionary success a. production of fertile offspring b. ability to compete with other species c. resiliency agaist environmental stressors d. ability to acquire food and resources e. All of the abovearrow_forwardYour friend remarks, “The giraffe stretched its neck while reaching for higher leaves; as a result, its offspring inherited longer necks.” Which statement is the BEST response to correct your friend’s misconception? A. overproduction of offspring leads to a struggle for survival B. characteristics acquired during an organism’s life are generally not passed on through genes to its offspring C. only favorable adaptations have survival value and unfavorable adaptations are removed from the population D. disuse of an organ may lead to its eventual disappearancearrow_forwardThe good genes model of sexual selection is a popular hypothesis for mate choice. What is an underlying flaw with the hypothesis that must be explained? Group of answer choices A. there is no evidence for mate choice in animals B. sexual selection will remove genetic variation for fitness C.animals are not capable of a sense of beauty D. different species have different traits that are important in mate choice E. all genes confer equal fitness in lab experimentsarrow_forward
- Consider the evolution of the population of a species of small rodents. Assume that the number of males and females are nearly equal. Due to statistical data one can assume that each female remains a juvenile for one year and then becomes an adult, and that only adults have offspring. The reproduction rate is 2. The adult surviving rate is α. The juvenile surviving rate is 2/5. Initially the population counted 100 females and 40 juveniles. What values of the adult surviving rate will ensure that the population stabilize?arrow_forwardWhich sequence of events in human evolution is most widely accepted? A. increase in brain size, tool-use, bipedalism, movement out of Africa B. tool-use, bipedalism, increase in brain size, use of fire C. bipedalism, increase in brain size, tool-use D. tool-use, use of fire, increase in brain size E. bipedalism, tool-use, increase in brain size How do we know that the footprints discovered by Mary Leakey’s team at the site of Laetoli are those of bipedal hominids? A. There is no evidence of a divergent big toe B. The stride width and length were similar to modern humans C. There is evidence of an arch D. all of these E. A and C only Which of the following were the first to arrive to the Western Hemisphere? A. Modern Homo sapiens B. Archaic Homo sapiens C. Homo erectus D. Neanderthalsarrow_forwardThe main idea behind Darwin’s theory of natural selection was Group of answer choices a. Competition for space between the individuals will limit a population b. Individuals pass on acquired characteristics to their offspring c. Individuals with advantageous adaptations are more likely to out-produce those lacking that adaptation d. Populations adapt over timearrow_forward
- Genetic variations in natural populations develop due to: Select one: A. random mutations of the DNA. B. changes in diet. O C. environmental catastrophies. D. changes in the environment. E. individual activities.arrow_forwardWhich statement is correct, based on current evolutionary theory? a. Selection will favor alleles only if they are good for the species. b. Selection will favor alleles only if, on average, they increase the reproductive success of individuals who have them. c. In small populations genetic drift can be more effective than natural selection in building adaptations. d. Selection sometimes favors alleles that systematically lower the reproductive success of the individuals who have them. e. Two of the above are correct.arrow_forwardDrag the correct enzyme and drop it on the correct function Cutting DNA Forms phosphodiester bonds Amplifies sections of DNA Produces cDNA from mRNA Restriction Enzyme Ligase DNA Polymerase Reverse Transcriptasearrow_forward
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