natural selection
inheritable traits that enhance their survival and reproductive success in the local environment.
He mainly studied birds; finches were the main ones he studied.
Scientists select model organisms to understand that particular life form, and its interactions with other life forms and with the environment. They choose particular organisms as models, because of the hopefully wider applicability of the scientific findings. Scientists think that what they learn from the particular model organism will help them understand other organisms. The basic idea comes from Charles Darwin's On the origin of Species, and The descent of man. According to that idea, all living organisms track back to the same ancestor, or the same ancestral gene pool. In particular, model organisms are selected, to understand human disease. Often, it is considered unethical to use people to sort out possible causes of and treatments for disease. So, for example, causes of and treatments for cancer have been studied through the use of mice in laboratories.
Darwin established the theory of natural selection (evolution). On the Galapagos Islands he was fairly free to walk among animals previously unexposed to humans, thus seeing him as no threat. He observed: (1) more offspring were produced than would survive based on the available resources (food, water, space), (2) the offspring varied in form and had a range of characteristics, (3) the offspring would compete for the available resources. Darwin concluded that the creatures that were best suited to a particular environment would survive long enough to reproduce and pass their characteristics to a new generation. This is evolution. "Survival of the fittest" is actually shortened from the phrase, "survival of the fittest in a particular environment". Individual creatures don't evolve. Species evolve. A species is a group of organisms capable of breeding and producing offspring. Evolution drives the creation of new species. No organism is more or less evolved than another. One organism may be more suited to survive in a particular environment.
1) Natural Selection 2) Climate changes 3) Geographical events 4) Radiations of organism into new habitats 5) Changes in ecosystem 6) Changes in continental position Above are mechanisms of selection, the environment, basically. Mechanisms of evolution are; mutation, gene flow. genetic drift and most importantly for adaptive changes, natural selection
Natural selection
Fitness
Charles Darwin realized that the measure of success for an organism also included an adaptation to surroundings. An organism cannot survive if it is not living in the right environment.
survvial of the fittest
Organism that are best fitted for survival, can rapidly adapt to the changes in there environment. before you search the meaning of ecology is the study of plants and animals and their interaction with one another and with their environment.
Charles Darwin observed that plants and animals reproduce to further their species. While some off spring may not survive, those that do are more suited to be prevailing environment and will pass those characteristics to the next generation.
Charles Babbage
Charles Babbage is the inventor of second generation computers.
Charles Darwin described this as "survival of the fittest". It is the central mechanism by which evolution takes place.
1822 and was designed by Charles Babbage
Bishop Charles S. Waters is Pastor & Founder Of New Generation Ministries in Baltimore, Maryland
Charles L. Harper is an author specializing in books about society and the environment. His best selling books include Exploring Social Change and Food, Society and Environment.