what are the three requirements for the process of natural selection?
9940
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.
1294272
You need to know the conditions required for natural selection to occur. These include: overproduction of offspring, inherited variation, and the struggle to survive, which result in differential reproductive success.
182155
['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.']
829512
There are four forces of evolution: mutation, gene flow, genetic drift, and natural selection. Mutation creates new genetic variation in a gene pool. Gene flow and genetic drift alter allele frequencies in a gene pool.
289364
['knowledge of biology.', 'to be thorough and pay attention to detail.', 'maths knowledge.', 'excellent written communication skills.', 'analytical thinking skills.', 'excellent verbal communication skills.', 'the ability to work well with your hands.', 'the ability to use your initiative.']
18565
['knowledge of biology.', 'excellent verbal communication skills.', 'the ability to work well with others.', 'science skills.', 'the ability to read English.', 'maths knowledge.', 'to be thorough and pay attention to detail.', 'excellent written communication skills.']
296754
['8 Characteristics of Life. Reproduction, Cells, Genetic Material, Evolution/Adaptation, Metabolism, Homeostasis, Response to Stimuli, Growth/Development.', 'Reproduction. Organisms make new organisms. ... ', 'Genetic Material. ... ', 'Cell. ... ', 'Grow and Develop. ... ', 'Metabolism. ... ', 'Response to Stimuli. ... ', 'Homeostasis.']
1006022
Natural selection is the gradual process by which biological traits become either more or less common in a population as a function of the effect of inherited traits on the differential reproductive success of organisms interacting with their environment.
1322471
Artificial selection is the identification by humans of desirable traits in plants and animals, and the steps taken to enhance and perpetuate those traits in future generations.
728358
['No gene mutations occurring at that locus or the loci associated with the trait.', 'A large population size.', 'Limited-to-no immigration, emigration, or migration (genetic flow)', 'No natural selection on that locus or trait.', 'Random mating (panmixis)']
1247154
['Describe the four basic causes of evolution: natural selection, mutation, genetic drift, and gene flow.', 'Explain how each evolutionary force can influence the allele frequencies of a population.']
403223
Natural selection describes the unequal survival and reproduction that results from the presence or absence of particular traits. According to Darwin evolution occurs through the process of natural selection.
1130798
['light intensity: light is required for photosynthesis , and plant species have evolved for optimum growth in the light available in their climate or habitat.', 'temperature: ... ', 'moisture levels: ... ', 'soil pH and mineral content: ... ', 'wind intensity and direction: ... ', 'carbon dioxide levels for plants: ... ', 'oxygen levels for aquatic animals:']
1049250
['Need for a suitable environment. ... ', 'Need for a suitable diet. ... ', 'Need to exhibit normal behaviour patterns. ... ', 'Need to be housed with, or apart, from other animals. ... ', 'Need to be protected from pain, suffering, injury and disease. ... ', '80 – 90%']
1343974
Natural selection acts on existing heritable variation. Natural selection needs some starting material, and that starting material is heritable variation. For natural selection to act on a feature, there must already be variation, and that variation must be able to be passed on to offspring.
364323
['Intro. [00:00]', 'Organization (all life is composed of 1 or more cells) [02:20]', 'Homeostasis. [02:54]', 'Metabolism (including need to obtain+use energy) [03:35]', 'Reproduction. [04:22]', 'Growth and Development. [04:46]', 'Response to Stimuli. [05:10]', 'Evolution (occurs in populations, can lead to adaptation) [05:58]']
1133653
['Food, Waste, and Gas Exchange. They need to maintain a workable ratio of surface area to volume to allow an efficient transfer of materials in and out of the cell.', 'Growth. In order for an organism to grow, they must divide so they can get larger.', 'Repair. ... ', 'Reproduction.']