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Natural Selection
Natural selection is a function of evolution. It involves biological traits becoming more or less prominent depending on the needs and environment of a specific species.
666 Questions
What is the unit of natural selection?
This is a bone of contention among some biologists, Some say that the individual organism is the smallest unit upon which natural selection directly acts and some say it is the gene.
I would check your textbook to see which way this wind blows, but most texts I have seen, or used, generally, say that the individual organism, or the individuals organism's phenotype is that which natural selection acts directly on. Of course, texts are conservative in their outlook.
Something funny here about attribution of answer, so I write this to get this answer under my user name.
What scene from this selection lingers your mind?
I'm unable to recall specific scenes from texts or provide detailed summaries. However, if you can provide the selection or book you are referring to, I could help generate a brief overview or analysis.
Staff selection refers to the process of identifying and choosing suitable candidates to fill job vacancies within an organization. This process typically involves activities such as job posting, screening resumes, conducting interviews, and making final selection decisions. The goal of staff selection is to find the best fit between the candidate's skills, qualifications, and experience, and the requirements of the position.
The vendor selection process in supply chain involves identifying potential vendors, evaluating their capabilities, negotiating terms, and making a final selection based on specific criteria such as quality, lead time, reliability, cost, and service level agreements. While unit price is an important factor, it should not be the sole criterion for selecting suppliers as other factors like quality, reliability, and vendor reputation can have significant impacts on overall supply chain performance. A balanced approach that considers a combination of cost, quality, and other factors is recommended for effective vendor selection.
Why do we care about variation in natural selection?
Variation is necessary for species to adapt and evolve new mechanisms or helpful alterations. Lets say a plague is killing an animal species - out of hundreds of millions of random genetic mutations (variations) in that generation (assuming there are at least a million or so of that species) some of those might make some of the species more resistent or even immune to that disease. Those animals' offspring will survive longer and reproduce more, and eventually their offspring will outnumber the non-resistent non-immune population, in effect replacing a weaker species with a slightly stronger, more sophisticated one.
That is natural selection, and it doesn't work without random genetic variations for environmental pressures to "select".
What does Darwinism universal acid mean regarding worldview and culture?
This refers to the far-reaching impact of Darwinism. It has been shown to be influencing ideas seemingly far removed from the scientific sphere in which it originated. The idea of a 'Universal Acid' is that 'Darwin's dangerous idea' as Daniel Dennett called it (in his book by this name) has had a corrosive effect in relation to religion, philosophy and human morals which have 'eaten away' as acid does on much that existed previously. One way it has done this is to remove, for many, the solid basis for both religion and morality previously held.
Did natural selection give rise to our ability to drive automobiles?
No, our ability to drive automobiles is not a trait that has evolved through natural selection. Driving is a learned skill and is not influenced by genetic traits that are subject to natural selection.
How was Charles Darwin's theories of natural selection were apllied to social Darwinism?
It wasn't!
Social Darwinism is a concept developed by Herbert Spencer and has nothing to do with the biological theory of evolution by natural selection. It is a Landmarkian concept in a fashion as groups compete with groups and acquired group superiority's are passed on. Also, the theory of evolution by natural selection is a individual selection theory, basically, and has nothing to do with group selection of this nature. Darwin was not pleased by this Spencerian corruption of his theory.
PS: I, personally, am appalled that this nonsense is still being taught in schools. Tell your teacher ( sociology, perhaps? ) to get a clue!
What is the major difference between social Darwinism and Darwin's idea of survival of the fittest?
The major difference is that social Darwinism applies Darwin's principle of "survival of the fittest" to human society, often to justify competition, inequality, and laissez-faire capitalism, while Darwin's idea itself refers to the natural selection process in the biological realm, where traits beneficial for survival and reproduction are passed on to future generations. Social Darwinism extends this concept to human interactions and societal organization.
How does social darwinism relates to natural selection?
Social Darwinism is a belief system that uses the principles of natural selection to justify social inequality and competition between individuals and groups in society. It draws parallels between the survival of the fittest in the natural world and the "struggle" in human societies. While natural selection explains how traits evolve in a population over time based on their survival and reproductive success, social Darwinism extends these principles to human interactions and societal structures.
When was the theory of natural selection developed?
The theory of natural selection was developed in the middle to late 1800's by a brilliant man by the name of Charles Darwin. Im not sure of an exact date - but his book Origin of Species was published on November 24, 1859. Of course research and speculation were made much earlier in order to come to the conclusion of his theory of Natural selection and evolution being the root of where and how life came to be and progress so diverse. Hope this helps a little...
What are six examples of natural selection?
One classic but hypothetical example is Daisyworld. In this hypothetical model, we envision a planet inhabited by a single species of life, a single population of daisies. These come in two variants: black daisies and white. The colour is a trait that is passed on genetically to offspring. In the model, that star at which the planet revolves is variant, increasing or decreasing in intensity, changing the amount of light/heat the planet is exposed to. Black daisies will absorb more sunlight, increasing temperatures at the planet surface, while white daisies reflect more sunlight, cooling the planet. Theoretically, increasing temperatures should make things uncomfortable for the black daisies, who heat up faster because of their colour, relative to the white daisies, so that when solar luminosity increases, white daisies gain a reproductive advantage over the black daisies.
A similar example but from real life is the evolution of the peppered moth during and after the industrial revolution. Initially, lighter moths and darker moths were in equilibrium, but as the industrial revolution caused soot to stain the surfaces on which moths frequently settle, and predators could more easily distinguish the lighter moths against the darkening surfaces, darker moths gained a reproductive advantage, as they more often survived predation.
Four more findings are:
Herrel, 2008, Rapid large-scale evolutionary divergence in morphology and performance associated with exploitation of a different dietary resource.
This paper describes how in a few short decades a population of lizards transported to a different environment gained different morphological features by adapting to its new habitat.
Rolshausen, 2009, Contemporary evolution of reproductive isolation and phenotypic divergence in sympatry along a migratory divide.
This paper describes how the interaction between migratory flocks and human settlements is causing a speciation event to occur between flocks that migrate along routes including cities, and those migrating away from cities.
Lenski, 1989, Long-Term Experimental Evolution in Escherichia coli. I. Adaptation and Divergence During 2,000 Generations.
This paper describes morphological changes and associated increased in fitness during the experimental evolution of E. coli populations.
Byrne, 1999, Culex pipiens in London Underground tunnels: differentiation between surface and subterranean populations.
Describes the divergence between above-ground populations of mosquito and populations living in the London Underground, leading to the emergence of a new species.
Can RNA undergo natural selection and evolve?
If RNA is used as a genetic molecule, passing traits from parent to offspring, then it is subject to natural selection.
This only happens in a number of viruses and very few bacteria, though: most organisms use DNA as their genetic molecule.
When will natural selection favor altruism?
Altruism is basically when a member sacrifices itself for the well being of the population. If the population that was protected has favorable traits, they will be naturally selected for and over generations become dominant in the population. If they weren't protected, the population could die out.
Why Over time why does natural selection continue to work?
Natural selection creates a stronger species that is able to live longer and produce more. It continues to work because after a few generations, the traits will become common in the population.
Is the monopoly contrary to the precepts of Darwinism?
Well, first of all, Darwinism doesn't really have precepts: it's a description for how things are in nature, not a set of instructions for how we should do things.
In Darwinism, too little variation has the effect of endangering the reproductive fitness of populations. Too little variation means that a population might not be able to adapt when the circumstances change. There would seem to be some similarities between our global economy and ecology. Certainly, if one values a robust and sound economy, one would prevent monopolies from gaining so much influence that their demise cripples the economy.
On the other hand, those who make the mistake of promoting Social Darwinism, committing the naturalistic fallacy, might argue that as only the strongest survive, monopolies are a natural and thus desireable consequence of the free market.
What does possible selection words?
Hi I am a 4th grader and possible selection words are for you to look for more words with ar,er,or and other stuffs
What explains natural selection?
I'm sure Darwin has a much better technical explaination but after all is said and done it simply means: The weak and stupid die at a much faster rate than the strong and intelligent.
What role does the environment play natural selection?
toilet paper...... just kidding it helps the plants grow and people live
Why must there be Variation in the population in order for natural selection?
Without the subtle differences on organisms phenotypes what would natural selection select from?
All organisms in a population are variants and some survive and reproduce better than other against the background of the immediate environment and these are selected by that environmental pressure.
How does overpopulation affect natural selection?
Natural selection is the process by which forms of life having traits that better enable them to adapt to specific environmental pressures, as predators, changes in climate, or competition for food or mates, will tend to survive and reproduce in greater numbers than others of their kind, thus ensuring the perpetuation of those favorable traits in succeeding generations.
lions of years.
Why is it important to refer a scorecard in actual selection of potential breeder?
jaguar>ant eatersType your answer here...
Which mutations are not subject to natural selection?
There are on the chromosomes stretches of DNA that do nothing. Their only purpose is provide matching stretches so the chromosomes match-up during fertilization. In here mutations occur but have no 'large' effect on the phenotype of the life-form. (If enough of them occur then the chromosome become of a different length and certain mating pairs can no longer match-up, but that takes a while to get a difference in length that really matters.)
Geneticists use these stretches and the changes in them to track evolutionary path-ways.
