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Questions and Answers
What is the primary focus of the 'struggle for existence' concept in Darwin's theory of evolution?
What is the primary focus of the 'struggle for existence' concept in Darwin's theory of evolution?
- Natural competition among living organisms for limited resources. (correct)
- The process by which species diverge from a common ancestor.
- Cooperation among different species to share resources.
- The effort of individuals to alter their traits to suit the environment.
Variation in physical traits among individuals in a group is irrelevant to natural selection.
Variation in physical traits among individuals in a group is irrelevant to natural selection.
False (B)
Define 'adaptation' in the context of evolutionary biology.
Define 'adaptation' in the context of evolutionary biology.
An adaptation is an inherited characteristic that increases an organism's chance of survival and reproduction in its environment.
According to the concept of 'survival of the fittest', the individuals most likely to survive and reproduce are those that have traits that best ________ their environment.
According to the concept of 'survival of the fittest', the individuals most likely to survive and reproduce are those that have traits that best ________ their environment.
Which of the following best describes the role of natural selection in the process of evolution?
Which of the following best describes the role of natural selection in the process of evolution?
Convergent evolution leads to closely related populations accumulating differences.
Convergent evolution leads to closely related populations accumulating differences.
Explain how divergent evolution contributes to biodiversity.
Explain how divergent evolution contributes to biodiversity.
When two or more species evolve in response to changes in each other, this process is known as ________.
When two or more species evolve in response to changes in each other, this process is known as ________.
Which of the following is an example of coevolution?
Which of the following is an example of coevolution?
Natural selection always results in the 'best' possible outcome for a population.
Natural selection always results in the 'best' possible outcome for a population.
Describe how 'survival of the fittest' is more accurately described as 'survival of the fit enough'.
Describe how 'survival of the fittest' is more accurately described as 'survival of the fit enough'.
Darwin and Wallace both considered factors such as struggle for existence and ________ when developing the theory of evolution.
Darwin and Wallace both considered factors such as struggle for existence and ________ when developing the theory of evolution.
What is the primary outcome of natural selection?
What is the primary outcome of natural selection?
Adaptation refers to an individual's ability to consciously change its physical traits to survive in a different environment.
Adaptation refers to an individual's ability to consciously change its physical traits to survive in a different environment.
Explain the relationship between natural selection and environmental change.
Explain the relationship between natural selection and environmental change.
________ evolution leads to unrelated species developing similar characteristics.
________ evolution leads to unrelated species developing similar characteristics.
What role does adaptation play in the survival of a species?
What role does adaptation play in the survival of a species?
Coevolution only occurs between predatory and prey species.
Coevolution only occurs between predatory and prey species.
Contrast divergent and convergent evolution.
Contrast divergent and convergent evolution.
Match the following terms with their definitions:
Match the following terms with their definitions:
Flashcards
Struggle for Existence
Struggle for Existence
Natural competition among living organisms for resources.
Variation
Variation
Differences in physical traits among individuals in a group.
Adaptation
Adaptation
Any inherited characteristic that increases an organism's chance of survival.
Survival of the Fittest
Survival of the Fittest
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Natural Selection
Natural Selection
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Divergent Evolution
Divergent Evolution
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Convergent Evolution
Convergent Evolution
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Coevolution
Coevolution
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Study Notes
- Unit 7 Evolution Study Guide covers chapters 17, 18, 19, 20 & 24
Factors Darwin and Wallace Considered
- Struggle for Existence refers to natural competition among living organisms
- Variation is the difference in the physical traits of individuals from other individuals in a group
- Adaptation is any inherited characteristic
- Survival of the Fittest says that the most fit survive through natural selection because organisms have traits that suit their environment
Natural Selection
- Natural selection is a mechanism of evolution
- Natural selection leads to descent with modification
- Individuals better suit their environment
Processes of Natural Selection
- Divergent Evolution involves the accumulation of differences between closely related populations
- Convergent Evolution is evolution toward similar characteristics in unrelated species
- Coevolution occurs when two or more species evolve in response to changes in each other
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