Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Chapter 23, Problem 16TYK
Summary Introduction
Introduction: The phenomenon of natural selection is based on the evolutionary changes that occur within the population. This evolutionary change helps an organism to adapt better to its surroundings or environment. Natural selection brings about evolutionary adaptation in the organisms.
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You are wandering in the Amazon rainforest, when you hear the loud call of an animal. You walk in the direction of the sound, and discover that it is coming from an adorable species of frog. a) What type of adaptation is being displayed by this species of frog? b) Describe how selection could work FOR and AGAINST this adaptation.
Would you expect sexual selection to increase or decrease adaptation of a population to its environment? A. Consider male-male competition first. B. Then consider the different mechanism for the evolution of female preferences and their implications for adaptation to the environment? Explain your thinking.
How does sexual selection differ from natural selection?
a. It does not require heritable traits.
b. It determines which individuals get to mate.
c. Variation is not required.
d. It only involves males.
Chapter 23 Solutions
Study Guide for Campbell Biology
Ch. 23 - a. What is a major source of genetic variation for...Ch. 23 - In a population of 200 mice, 98 are homozygous...Ch. 23 - Use the allele frequencies you determined in...Ch. 23 - Practice using the Hardy-Weinberg equation so that...Ch. 23 - Prob. 5IQCh. 23 - Why hasnt the highly deleterious sickle-cell...Ch. 23 - a. What is Hardy-Weinberg equilibrium? b. Define...Ch. 23 - Prob. 2SYKCh. 23 - Prob. 1TYKCh. 23 - Prob. 2TYK
Ch. 23 - Prob. 3TYKCh. 23 - Prob. 4TYKCh. 23 - Mice have an estimated 1,000 olfactory receptor...Ch. 23 - Prob. 6TYKCh. 23 - If a population has the following genotype...Ch. 23 - In a population with two alleles, B and b, the...Ch. 23 - Prob. 9TYKCh. 23 - Prob. 10TYKCh. 23 - In a random sample of a population of shorthorn...Ch. 23 - Genetic drift is likely to be seen in a population...Ch. 23 - Porphyria variegata is a genetic disease...Ch. 23 - Cystic fibrosis is a very serious genetic disorder...Ch. 23 - Prob. 15TYKCh. 23 - Prob. 16TYKCh. 23 - Prob. 17TYKCh. 23 - Prob. 18TYKCh. 23 - Prob. 19TYKCh. 23 - Prob. 20TYKCh. 23 - Prob. 21TYK
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- Which of the following situations will lead to natural selection? a. The seeds of two plants land near each other and one grows larger than the other. b. Two types of fish eat the same kind of food, and one is better able to gather food than the other. c. Male lions compete for the right to mate with females, with only one possible winner. d. all of the abovearrow_forwardWhich of the following is the best description of sexual selection? a. Sexual selection is the differential reproductive success due to variation in acquiring immunity from mates. b. Sexual selection is the differential reproductive success due to variation in survival from social selection. c. Sexual selection is the differential reproductive success due to variation in acquiring mates or mating success. d. Sexual selection is the differential survival success due to variation in avoiding mates or mating success.arrow_forwardIn a species of beetles, males that have large horns are better able to fight off other males for access to females. This is an example of _______ selection.arrow_forward
- Some females seem to prefer the green colouration and some females seem to prefer the blue colouration. What type of selection is this an example of? a. stabilizing b. balancing c. directional d. diversifyingarrow_forwardThis hypothesis suggests that a resulting association of female preference and male display trait can lead to a positive feedback cycle of ever stronger preference and greater display trait. A. Fisher-Zahavi process. B. Fisher's runaway model. C.Good genes process. D.Bateman's principle.arrow_forward why do females have a greater disadvantage compared to males concerning sexual reproduction? How has this difference between the sex shape sexual selection in general? Choose one form of communication and explain how it is used by competing sex is attracting a mate. arrow_forward
- Courtship rituals are thought to have come about througha. intrasexual selection.b. agonistic behavior.c. intersexual selection.d. kin selection.arrow_forwardWhich 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 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
- a.)What effect does directional selection have on genetic variation? b.)A population has an allele that encodes for ear size, large ear being dominant and small ear being recessive. The frequency of the dominant allele is .6. What percentage of the population has big ears?arrow_forwardDescribe how courtship behavior drives sexual selection. Use the peacock as an example.arrow_forwardThe sacrifice of the life of an individual so that the genes of relatives may be passed on is called ________. a. operant learning b. kin selection c. kinesis d. imprintingarrow_forward
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