What is Life? A Guide to Biology 3e & LaunchPad for Phelan's What is Life? (Six Month Access) 3e
3rd Edition
ISBN: 9781319028503
Author: Jay Phelan
Publisher: W.H. Freeman & Co
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Chapter 9, Problem 9MC
Summary Introduction
Introduction:
Reciprocal altruism may commonly be called kindness towards the unrelated individuals. It is costly behavior where the behavior is directed towards the benefit of another individual that are not related, while expecting to get the favor in return.
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Which 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.
If this model continues, with no major changes to the environment, what do you expect to happen?
A) rabbits will continue to get lighter over time
B) there is no way to predict because mutations are random
C) mutations will all die out leaving only the original fur color
D) dark gray fur will become the common phenotype because it favors survival
27) Which sex does the selecting in Sexual Selection?
A) the more attractive sex
B) males
C) hermaphrodites
D) females
E) the sex with the greatest investment in the offspring
28) "Population" is best defined as
A) individuals that are evolving.
H) a geographically localized group of individuals capable of eachanging DNA
C) the diverse offspring of a single mating pair.
D) one particular species.
E) new alleles in the gene pool.
29) The limbic system is involved in which behaviors?
A) controlling complex programmed motor movements
B) detecting chemicals dissolved in liquids
C) mediating sleep/wake cycles
D) analysis of sensory information
E) learning and memory
30) Human vision is best at detecting
A) heat-sources.
B) colors and movement.
C) distant objects.
D) stationary objects at night.
E) All of the above.
31) Essential nutrients are those molecules that
A) include some amino acids.
B) the body cannot manufacture.
C) include the vitamins.
D) are needed for proper functioning of the…
Chapter 9 Solutions
What is Life? A Guide to Biology 3e & LaunchPad for Phelan's What is Life? (Six Month Access) 3e
Ch. 9 - Prob. 1SACh. 9 - Prob. 2SACh. 9 - Prob. 3SACh. 9 - Prob. 4SACh. 9 - Prob. 5SACh. 9 - Prob. 6SACh. 9 - Prob. 7SACh. 9 - Prob. 8SACh. 9 - Prob. 9SACh. 9 - Prob. 10SA
Ch. 9 - Prob. 11SACh. 9 - Prob. 12SACh. 9 - Prob. 13SACh. 9 - Prob. 14SACh. 9 - Prob. 15SACh. 9 - Prob. 16SACh. 9 - Prob. 1MCCh. 9 - Prob. 2MCCh. 9 - Prob. 3MCCh. 9 - Prob. 4MCCh. 9 - Prob. 5MCCh. 9 - Prob. 6MCCh. 9 - Prob. 7MCCh. 9 - Prob. 8MCCh. 9 - Prob. 9MCCh. 9 - Prob. 10MCCh. 9 - Prob. 11MCCh. 9 - Prob. 12MCCh. 9 - Prob. 13MCCh. 9 - Prob. 14MCCh. 9 - Prob. 15MCCh. 9 - Prob. 16MC
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- When it comes to adaptation, survival of a species' trait through artificial selection depends on a) which trait is the fittest for the environment b) which trait humans desire to reproduce c) which trait is the oldest for the species d) which trait has more abundance in the populationarrow_forwardA set of beliefs and practives that involves the controlled selective breeding of human populations with the hope of improving their heritable qualities, especially through surgical procedures like sterilization and legal rulling that affect marriage rights for interracial couples, is known as: A) non-concordance B) biological determinism C) eugenics D) natural selectionarrow_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
- ADJUST Negative assortative mating means that organisms choose mates that are different from themselves. If negative assortive mating occurs in a population, what would expect to happen to genotype frequency over generations? O a) Frequency of the heterozygous genotype will increase. b) Frequency of the homozygous genotypes will decrease. O c) Frequency of the homozygous genotypes will increase. O d) Both A and B AUTO ||||||||| Cancel Revertarrow_forwardAlthough natural selection is sometimes called the survival of the fittest, it is ultimately a process of: a) differential reproduction b) differential consumption c) differential migration d) differential mutationarrow_forward6)Which one of these statements about fitness is most accurate? a)Fitness is a measure of strength & health b)Fitness can only be measured at the population level c)Fitness may change at a population level, but is constant for an individual d)Fitness is an overall measurement that applies to all evolutionary mechanisms e)Fitness is a measure of reproductive successarrow_forward
- Which of the following is true about adaptation? a) It occurs through the inheritance of acquired characteristics b) It always results in the evolution of new traits c) It is a result of chance mutations d) It is the result of natural selection acting on heritable variationarrow_forward1.) The process in which the genetic composition of a population changes with time is known as evolution. Which of the following mechanisms is not an agent of evolutionary change? A) natural selection B) mutation C) genetic drift D) random mating 2.) Which statement below is not consistent with a population in Hardy-Weinberg equilibrium? A) Genetic drift is occuring B) Random mating is occuring. C) Population size is large. D) Migration is not occuring.arrow_forward9) This chart shows the beak length of a population of finches in the Galapagos. The island was faced with a five year drought that made it difficult for birds to get water. If natural selection occurs, how would you predict the bird beak lengths to change? A) Only those with shorter beaks would survive. B) The population would not really change much. C) Only those with the longest beaks would survive. D) Those with medium-long beaks would increase most. Not Gradedarrow_forward
- Which of the following contribute to keeping low-fitness alleles in our gene pool? Choose all that are correct a) Random mating b) New mutations c) Inefficient selection against rare recessive disease-causing alleles d) Late age of onset of some diseases e) Efficient selection against rare recessive disease-causing allelesarrow_forwardThe continued evolutionary exaggeration, across generations, of a sexual display trait (e.g., a trait used by males in attracting mates, like the peacock's tail) is most likely due to: a) stabilizing fecundity selection O b) directional sexual selection c) genetic drift d) heterozygote advantage e) directional viability selectionarrow_forwardNegative assortative mating means that organisms choose mates that are different from themselves. If negative assortive mating occurs in a population, what would expect to happen to genotype frequency over generations? a) Frequency of the heterozygous genotype will increase. b) Frequency of the homozygous genotypes will decrease. c) Frequency of the homozygous genotypes will increase. O d) Both A and Barrow_forward
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