Selection pressure is a term used in evolutionary biology to describe any phenomena which alters the behavior and fitness level of living organisms within a given environment. It is the driving force of evolution and natural selection, and it can be caused by a variety of factors including environmental changes, predation risk, or a shift in available resources. Here's how it affects a population, step by step:

1. **Introduction of a Selection Pressure**: The first step is the introduction of a selection pressure into an environment. This could be a change in climate, the introduction of a new predator, a disease, or any other factor that makes survival more challenging.

2. **Variation in the Population**: Within any population, there is genetic

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Selection pressure is a term used in evolutionary biology to describe any phenomena which alters the behavior and fitness level of living organisms within a given environment. It is the driving force of evolution and natural selection, and it can be caused by a variety of factors including environmental changes, predation risk, or a shift in available resources. Here's how it affects a population, step by step:

1. **Introduction of a Selection Pressure**: The first step is the introduction of a selection pressure into an environment. This could be a change in climate, the introduction of a new predator, a disease, or any other factor that makes survival more challenging.

2. **Variation in the Population**: Within any population, there is genetic

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Selection pressure is a term used in evolutionary biology to describe any phenomena which alters the behavior and fitness level of living organisms within a given environment. It is the driving force of evolution and natural selection, and it can be caused by a variety of factors including environmental changes, predation risk, or a shift in available resources. Here's how it affects a population, step by step:

1. **Introduction of a Selection Pressure**: The first step is the introduction of a selection pressure into an environment. This could be a change in climate, the introduction of a new predator, a disease, or any other factor that makes survival more challenging.

2. **Variation in the Population**: Within any population, there is genetic

Explain how a selection pressure affects a population.

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