Natural Selection Theory
• Explanation of the concept of natural selection and how it takes place
The theory of natural selection was developed by Charles Darwin and Alfred Russel Wallace. They suggested that the mechanism of natural selection was that some organisms have characteristics that are better suited to the environment they live in then others that don’t have these characteristics. These organisms are then more expected to survive to reproduce offspring with these characteristics, over generations new organisms would be better adapted to the environment would evolve.
Natural selection occurs in a specific process that results in the formation of new species. This process includes:
1. A species produce more offspring than what can survive
2. In each species …show more content…
Many of the chemical reactions occurring in a human’s cell, a fungus and a bacterial cell are all different from each other however many are actually the same showing that all organisms share a common ancestry. For example biochemical analysis can be used for respiration in mitochondria this process includes the testing for common mutations in mitochondrial DNA in blood and urine as well as POLG mutations and measurements of thymidine. Then if this shows a negative result they will begin to take tissue samples from skeletal muscle, the heart or liver where biochemical analysis is then used to measure the respiratory chain activities and the amount of coenzyme Q10, this then allows them to pinpoint the mitochondrial DNA arrangements and rearrangements.
• Describe the historical development of evolution and assess social and political influences on these.
At the beginning of the 19th century there was evidence available for evolution but no mechanism. At this point people preferred to believe that organisms were created by themselves.
It wasn’t until Jean- Baptiste Lamarck proposed that environmental change began the start of changes in an organism =. Characteristics were now thought to be able to inherit. Inheritance was now believed to be the possible mechanism. This went on to be believed by everyone from 1801 up until …show more content…
DDT did not break down in the environment or bodies of species, it is insoluble in water meaning it can’t just be washed away. Instead it dissolves in body fats of animals eventually as each species is eaten the prey of that animal will develop a higher concentration of DDT and so it will eventually reach the top of the food chain. DDT also slowed down the growth and photosynthesis in green algae, however in aquatic vertebrates it can cause nervous system disorders or reproductive disabilities which could potentially mean the species could die out.
Mosquitoes were sprayed with DDT in order to kill them off so it would cause a decrease the chances of a species getting any of the harmful diseases that they can carry. When a mosquito were sprayed with DDT it opens sodium ion channels in the neuron meaning they fire spontaneously and eventually leads to spasms and death. However when an insect becomes resistant to DDT they develop particular mutations in the sodium channel
The theory of natural selection was developed by Charles Darwin and Alfred Russel Wallace. They suggested that the mechanism of natural selection was that some organisms have characteristics that are better suited to the environment they live in then others that don’t have these characteristics. These organisms are then more expected to survive to reproduce offspring with these characteristics, over generations new organisms would be better adapted to the environment would evolve.
Natural selection occurs in a specific process that results in the formation of new species. This process includes:
1. A species produce more offspring than what can survive
2. In each species …show more content…
Many of the chemical reactions occurring in a human’s cell, a fungus and a bacterial cell are all different from each other however many are actually the same showing that all organisms share a common ancestry. For example biochemical analysis can be used for respiration in mitochondria this process includes the testing for common mutations in mitochondrial DNA in blood and urine as well as POLG mutations and measurements of thymidine. Then if this shows a negative result they will begin to take tissue samples from skeletal muscle, the heart or liver where biochemical analysis is then used to measure the respiratory chain activities and the amount of coenzyme Q10, this then allows them to pinpoint the mitochondrial DNA arrangements and rearrangements.
• Describe the historical development of evolution and assess social and political influences on these.
At the beginning of the 19th century there was evidence available for evolution but no mechanism. At this point people preferred to believe that organisms were created by themselves.
It wasn’t until Jean- Baptiste Lamarck proposed that environmental change began the start of changes in an organism =. Characteristics were now thought to be able to inherit. Inheritance was now believed to be the possible mechanism. This went on to be believed by everyone from 1801 up until …show more content…
DDT did not break down in the environment or bodies of species, it is insoluble in water meaning it can’t just be washed away. Instead it dissolves in body fats of animals eventually as each species is eaten the prey of that animal will develop a higher concentration of DDT and so it will eventually reach the top of the food chain. DDT also slowed down the growth and photosynthesis in green algae, however in aquatic vertebrates it can cause nervous system disorders or reproductive disabilities which could potentially mean the species could die out.
Mosquitoes were sprayed with DDT in order to kill them off so it would cause a decrease the chances of a species getting any of the harmful diseases that they can carry. When a mosquito were sprayed with DDT it opens sodium ion channels in the neuron meaning they fire spontaneously and eventually leads to spasms and death. However when an insect becomes resistant to DDT they develop particular mutations in the sodium channel