What selects the fittest adaptation?
Darwin explained that it is the environment or nature itself that “selects” which individuals are best adapted to it or are best “fit.” For the six litters of rabbits, those whose particular traits give them an advantage in their particular environment are the ones who most likely will survive.
What are the factors of natural selection?
Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population. If they are met, natural selection automatically results.
What are the 3 factors that influence natural selection?
Natural selection occurs if four conditions are met: reproduction, heredity, variation in physical characteristics and variation in number of offspring per individual.
What are the limits to natural selection?
Evolutionary theory predicts that factors such as a small population size or low recombination rate can limit the action of natural selection. The emerging field of comparative population genomics offers an opportunity to evaluate these hypotheses.
What are the 4 main factors that affect natural selection?
Darwin’s process of natural selection has four components.
- Variation. Organisms (within populations) exhibit individual variation in appearance and behavior.
- Inheritance. Some traits are consistently passed on from parent to offspring.
- High rate of population growth.
- Differential survival and reproduction.
What are the two types of natural selection?
Types of natural selection: Different types of natural selection can impact the distribution of phenotypes within a population.In (a) stabilizing selection, an average phenotype is favored.In (b) directional selection, a change in the environment shifts the spectrum of phenotypes observed.In (c) diversifying selection.
Do you think humans are still subject to natural selection?
Genetic studies have demonstrated that humans are still evolving. To investigate which genes are undergoing natural selection, researchers looked into the data produced by the International HapMap Project and the 1000 Genomes Project.