- Darwin's theory of evolution was very unorthodox. Went against all churches and former history in the UK.
- All forms of life on earth evolved from a single branch of life.
- Darwin made this discovery through his exploration of the Gallpagos islands.
- he examined the different species of finch and how their beaks were relative to the food that they ate
- He also founded the theory of natural selection, which he thought was the key to evolution. In the struggle for existence, those individuals with favorable variations would survive and reproduce, but those with unfavorable variations wouldn't.
He had a list of basic processed that goes as follows:
1. All species are capable of producing offspring at a faster rate than food supplies increase.
2. There is biological variation within all species.
3. Since in each generation more offspring are produced then can survive, and because of limited resources, there is competition among individuals.
4. Individuals who possess favorable variations or traits (for example, speed, resistance to disease, protective coloration) have an advantage over those who don't have them. In other words, they have greater fitness because favorable traits increase the likelihood of survival and reproduction.
5. The environmental context determines wether or not a trait is beneficial. What is favorable in one setting may be liability in another. Consequently, the traits that become most advantageous are the results of a natural process.
6. Traits are inherited and passed on to the next generation. Because individuals who possess favorable traits contribute more offspring to the next generation than others do, over time, those favorable traits become more common in the population. Less favorable characteristics aren't
Passed as frequently, so they become less common overtime and are weeded out. Individuals who producd more offspring in comparison to others are said to have greater reproductive success or fitness.
7. Over long periods of geological time, successful variations accumulate in a population, so that later generations may be distant from ancestral ones. Thus, in time, a new species may appear.
- All forms of life on earth evolved from a single branch of life.
- Darwin made this discovery through his exploration of the Gallpagos islands.
- he examined the different species of finch and how their beaks were relative to the food that they ate
- He also founded the theory of natural selection, which he thought was the key to evolution. In the struggle for existence, those individuals with favorable variations would survive and reproduce, but those with unfavorable variations wouldn't.
He had a list of basic processed that goes as follows:
1. All species are capable of producing offspring at a faster rate than food supplies increase.
2. There is biological variation within all species.
3. Since in each generation more offspring are produced then can survive, and because of limited resources, there is competition among individuals.
4. Individuals who possess favorable variations or traits (for example, speed, resistance to disease, protective coloration) have an advantage over those who don't have them. In other words, they have greater fitness because favorable traits increase the likelihood of survival and reproduction.
5. The environmental context determines wether or not a trait is beneficial. What is favorable in one setting may be liability in another. Consequently, the traits that become most advantageous are the results of a natural process.
6. Traits are inherited and passed on to the next generation. Because individuals who possess favorable traits contribute more offspring to the next generation than others do, over time, those favorable traits become more common in the population. Less favorable characteristics aren't
Passed as frequently, so they become less common overtime and are weeded out. Individuals who producd more offspring in comparison to others are said to have greater reproductive success or fitness.
7. Over long periods of geological time, successful variations accumulate in a population, so that later generations may be distant from ancestral ones. Thus, in time, a new species may appear.
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