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In order for evolution to occur in a population over time, there MUST be variations amongst the individuals in the population. This is because natural selection acts upon favorable traits.
In order for evolution to occur in a population over time, there MUST be variations amongst the individuals in the population. This is because natural selection acts upon favorable traits.
Some organisms are faster, slower, bigger, smaller, more intelligent, less intelligent, better at attracting mates, have different colors, etc. Of course, these are very obvious examples of variation, but don't forget that variation can occur on a cellular or molecular level as well. For example, some individuals may be more efficient at metabolizing proteins than others, organisms may have different blood types, stronger immune systems, etc.
Some organisms are faster, slower, bigger, smaller, more intelligent, less intelligent, better at attracting mates, have different colors, etc. Of course, these are very obvious examples of variation, but don't forget that variation can occur on a cellular or molecular level as well. For example, some individuals may be more efficient at metabolizing proteins than others, organisms may have different blood types, stronger immune systems, etc.
- Organisms with traits that are best suited for the current environmental conditions have a better chance of survival
- These organisms are said to have "favorable variations." Natural selection favors these individuals
- Organisms with traits that are less suited for the current environmental conditions have a lower chance of survival.
- These organisms are said to have "unfavorable variations." Natural selection acts against these individuals
Here are two beetles in the same population! They are VARIATIONS of a single species. These beetles can mate with each other and produce offspring that could be green or gray. They do NOT represent two different species- they represent genetic variations that exist within a single population of beetles.
Here are two beetles in the same population! They are VARIATIONS of a single species. These beetles can mate with each other and produce offspring that could be green or gray. They do NOT represent two different species- they represent genetic variations that exist within a single population of beetles.
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