At this point, the exactness of the human evolutionary tree is disputed; several specimens have been found, the characteristics and times of which complicate the tree somewhat. However, there are at most two or three further ancestors before we reach the most recent common ancestor of chimpanzees and humans 5 to 7 million years ago - it is some interesting research to go back further, and shall be left to the reader if they are interested.
Natural selection is the primary way for organisms to evolve.æ However, it is not the only variable involved in evolution. Artificial selection,æwhereby specific traits are chosen to evolve by humans, is now commonplace and because we can genetically engineer organisms we will continue to do so.
These plants and animals were subjected to artificial selection so that the traits humans wanted in the organisms were selected for and the organisms not having these traits were culled. This, with some modification, is a good analogue for natural selection and artificial selection shows how organisms can be shaped over time with the proper selective pressures. The selective pressure of humans in artificial selection and the selective pressure of the environment in natural selection.
Wheat is a crop that has been domesticated through artificial selection, not natural selection. Humans selectively bred wild grasses over thousands of years to enhance desirable traits such as seed size, yield, and resistance to diseases, resulting in the cultivated wheat we have today.
Artificial selection tends to occur more quickly than natural selection because it involves intentional breeding by humans to promote desired traits in organisms. This focused approach can lead to rapid changes in specific characteristics over a few generations. In contrast, natural selection operates through environmental pressures and can take much longer for significant changes to occur, as it relies on random genetic variations and survival advantages over time.
Physical appearance, behavior, and specific skills are traits that humans often select for in breeding programs or domestication processes rather than relying on natural selection. This can lead to a rapid change in these traits over generations due to intentional selection pressures imposed by humans.
Humans
Sociobiology is the application of natural selection to human society Humans are the product of natural selection at the individual level and the product of evolution at the population level, so the human generated society is influenced by the natural selection of individual humans.
Natural selection is the primary way for organisms to evolve.æ However, it is not the only variable involved in evolution. Artificial selection,æwhereby specific traits are chosen to evolve by humans, is now commonplace and because we can genetically engineer organisms we will continue to do so.
Yes, it happens, but what is your question?
These plants and animals were subjected to artificial selection so that the traits humans wanted in the organisms were selected for and the organisms not having these traits were culled. This, with some modification, is a good analogue for natural selection and artificial selection shows how organisms can be shaped over time with the proper selective pressures. The selective pressure of humans in artificial selection and the selective pressure of the environment in natural selection.
In natural selection, the animals take time and evolve slowly. In selective breeding, humans can transfer genes from one organism into another organism.
Humans have countered natural selection through hybrid breeding. Even crossing a male donkey with a female horse produces a mule. Crossing certain corn strains with other corn strains to produce more grain per ear.
no you idiot, we started as micro organisms and fu**ed and developed into someting else and contiued then men and women were made
NO. Both artificial and natural selection are forms of Evolution in general. Both cause variation by selection within a particular population. The only difference is who is doing the selection, humans or nature.
Wheat is a crop that has been domesticated through artificial selection, not natural selection. Humans selectively bred wild grasses over thousands of years to enhance desirable traits such as seed size, yield, and resistance to diseases, resulting in the cultivated wheat we have today.
the introduction of rabbits into Australia has had an effect on the Australian hairy nosed wombats. this effect has been caused due to the competition for resources.the competition for resources has caused the wombats to evolve through the natural selection process.
The concept of artificial selection, where humans selectively breed plants or animals for desired traits, helped Darwin understand the process of natural selection. He realized that if humans could influence changes in species through selective breeding, then nature could also act as a selective force, leading to the survival of organisms best suited to their environment. This insight informed Darwin's theory of evolution by natural selection, where the environment naturally selects for characteristics that provide a reproductive advantage.