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How does natural selection occur?
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Nov 3, 2023 · Learn how natural selection drives evolution by favoring the best-suited traits in a population. See examples of natural selection in action, from fish to flowers to humans.
- Ed Grabianowski
Natural selection is one of the basic mechanisms of evolution, along with mutation, migration, and genetic drift. Darwin’s grand idea of evolution by natural selection is relatively simple but often misunderstood. To see how it works, imagine a population of beetles: There is variation in traits.
Learn how Charles Darwin proposed the idea of biological evolution by natural selection, based on his observations of finches in the Galápagos Islands. Explore the key points, examples, and evidence of his theory and its implications for modern biology.
- In the example of the mice and hawks, what if due to natural selection the hawk's ability to spot ou...Very good! You've correctly deduced an important evolutionary process known as co-evolution. This phenomenon is a key to understanding not just pre...
- How would have homo sapiens evolved from the apes , why did the characteristics of standing erect do...From the Homo Sapiens book, Yuval shared a very simple but reasonable concept that standing on 2 legs on the ground will give more broad and wide o...
- If natural selection is favouring traits which are beneficial for the environment then couldn't it b...Natural selection favors traits that are better for the ORGANISM'S survival and reproduction not for the environment. So actually the inverse would...
- I have a doubt, is it possible for natural selection to reduce the size of an organism? If possible,...Of course, natural selection just selects for the organisms that will be the most fit (have the most offspring) in a particular environment. One si...
- How does natural selection occur in both plants and animals?Natural selection is a mechanism that makes any species - be it a plant, animal, fungus, bacteria, you name it - better adapted to their environmen...
- All theories must be testable with many pieces of evidence to back it up. Is there any examples of f...That's not how science works. You can come up with any ridiculous theory and find as many evidences for it you please. What you should do is to cre...
- on the second to the last paragraph,i would like to ask if such heritable differences occur to the p...Not sure about animal species. In-plant kingdom it occurs and helps the creation of new species or more 'potent' for agriculture, such as watermelo...
- In the example of the mice and predatory birds, why wouldn't the birds also evolve--better eyesight,...Over time this will happen. This is an important part of evolution called co-evolution, where the evolution of one species affects the evolution of...
- What are the three observations that Darwin's concept of natural selection was based on?Darwin's concept of natural selection was based on several key observations: -Traits are often heritable. In living organisms, many characteristics...
- Is there other theory that doesn't agree with Darwin's theory of evolutionThere have been other theories but they disagree with observations that the theory of evolution through natural selection explains.
Oct 19, 2023 · Learn how natural selection is the process of adaptation and evolution through genetic variation and inheritance. See examples of natural selection in action, such as Darwin's finches and pigeon breeding.
Learn how natural selection works at the level of genes, alleles, genotypes, and phenotypes. See examples of how natural selection can cause microevolution and make populations adapted to their environment.
- If disruptive selection occurs on a population, is it possible that it could result in two separate ...It is possible but one of the things that need to happen for speciation to occur is for the two different populations to decrease or stop interming...
- Can directional selection lead to allopatric speciation?That is an interesting question. Directional selection helps the survival of the most extreme phenotype. And now you are looking at it from a broad...
- Why is it important to examine the fitness of each individual relative to others in the population?To see what is possible fate of each individual and population itself. To follow the evolution and the process of speciation.
- If disruptive selection of this type persisted for a prolonged period, what would be the likely outc...I Suppose that if disruptive selection persisted for a prolonged extent of time, this will lead to the extinction of moderate phenotypes.
- Why would the Disruptive selection not work fro the medium colored beetles?Because they have nowhere to hide. There is no "medium" colored shrub for them to hide in, whereas for the light and dark colored beetles they can...
- When applying the mechanism of natural selection, how does a population become suited to their envir...Consider that natural selection will lean toward fitness-increasing alleles becoming more common in a population. _Fitness_ is a measure of reprodu...
- Using relative frequency and graphical analysis, how do you determine whether or not a population is...If you measure the allele frequencies in a population this year, then again next year; if they differ significantly, then allele frequencies have c...
- can natural selection have negative effects on an environment?I do not think so. haven't seen any case so far.
Learn how natural selection is a mechanism of evolution and how species adapt to their environment through variations in traits. See examples of natural selection in action, such as the peppered moth, the flu virus, and antibiotic-resistant bacteria.
- 18 min
- Sal Khan
Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations.
