Problem 7 Why is natural selection the onl... [FREE SOLUTION]

Chapter 5: Problem 7

Why is natural selection the only process that can result in adaptation?

Short Answer

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Answer: Natural selection is the only process that can lead to adaptation in species because it is based on the differential survival and reproduction of individuals with favorable traits, consistently increasing an organism's fitness in relation to its environment. Other processes, such as genetic drift, gene flow, and mutation, can alter the frequency of traits in a population but do not necessarily result in an increase in fitness or adaptability. It is the consistent selection pressure acting on inherited traits that makes natural selection the only process capable of leading to species' adaptations.

Step by step solution

Define Natural Selection

Natural selection is the process by which individuals with certain traits or characteristics have a higher chance of survival and reproduction than those without these traits. As a result, these favorable traits become more common in successive generations of a population, leading to gradual adaptations and evolution.

Define Adaptation

Adaptation is the process by which a species becomes better suited to its environment, enabling it to increase its chances of survival and reproduction. Adaptations are inherited traits or characteristics that have evolved over generations due to the influence of natural selection.

Explain The Mechanism of Natural Selection

Natural selection occurs through four main factors: 1. Variation: There must be variation in traits or characteristics within a population. 2. Inheritance: These variations must be inheritable so they can be passed on to the next generation. 3. Selection Pressure: There must be a selective pressure, such as predation, competition, or environmental change, that affects the survival of individuals. 4. Differential Reproduction: Individuals with more favorable traits have a higher chance of surviving, reproducing, and passing on their traits to offspring.

Discuss Other Evolutionary Processes

While natural selection is a major factor in evolution, other processes also contribute to changes in populations. These include genetic drift, gene flow, and mutation. However, these processes do not lead to adaptation as they do not consistently increase an organism's survival or reproductive success.

Explain Why Natural Selection Is the Only Process That Leads to Adaptation

Because natural selection is based on the differential survival and reproduction of individuals with favorable traits, it is the only process that consistently increases an organism's fitness in relation to its environment. Genetic drift, gene flow, and mutation can alter the frequency of traits in a population, but they do not necessarily result in an increase in fitness or adaptability. It is the consistent selection pressure acting on inherited traits that makes natural selection the only process capable of leading to species' adaptations.

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Why is natural selection the only process that can result in adaptation?

Short Answer

Step by step solution

Define Natural Selection

Define Adaptation

Explain The Mechanism of Natural Selection

Discuss Other Evolutionary Processes

Explain Why Natural Selection Is the Only Process That Leads to Adaptation

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