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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 a food selection model?

A food selection model is a framework used to guide individuals in making choices about what foods to consume based on various factors such as nutrition, taste preferences, cultural considerations, and availability. These models typically aim to promote balanced and healthful eating habits by providing guidelines on portion sizes, food variety, and frequency of consumption. Examples include the MyPlate model and the Mediterranean diet pyramid.

What are four limitng factors of natural selection?

the factors that are necessary for natural selection by evolution to occur are:

1)variation in characteristics;different individuals in a population must have different characteristics.

2)differencies in fitness different characteristics of different individuals must contribute to differences and fitness.

3)heritability of characteristics characteristics that affects fitness must be heritable.... example:passed by genes from one generation to the next)

How do mutations relate to natural selection?

Mutation, a copying error in the replication of DNA, can give rise to variation in an organisms phenotype and if this new phenotype is beneficial to survival and reproductive success ( as little as 1% ) it will be selected naturally against the immediate environment, then if this so selected organism leave many descendents with the same beneficial traits then the populations gene pool will change in allele frequency and you have evolution.

( a 19th century sentence Darwin would be proud of! )

What is the natural selection that favors one extreme?

Directional selection favors one extreme phenotype in a population, causing a shift in the distribution of traits towards that extreme. This occurs when the environment changes and one extreme trait becomes more advantageous for survival and reproduction.

Are natural selection and artificial selection opposites?

Natural selection and artificial selection are not opposites; rather, they are both mechanisms of selective breeding. Natural selection occurs in nature with environmental factors determining which traits are passed on to offspring, while artificial selection is guided by human intervention to produce specific desired traits in organisms. Both processes involve the differential survival and reproduction of individuals based on their inherited characteristics.

How is lamarkism better than Darwinism?

Lamarkism is not considered better than Darwinism as it has been largely discredited in the scientific community. Darwinism, or modern evolutionary theory, is supported by evidence from genetics, comparative anatomy, and the fossil record. It provides a more comprehensive and accurate explanation for the mechanism of evolution through natural selection.

What is hypothetical real-world example using simple selection in selection control structure?

A hypothetical example could be a program that determines whether a person is eligible to vote based on their age. If the person is 18 years old or above, the program will display a message saying they can vote; if they are below 18, the program will display a message saying they are not eligible to vote.

What requires natural selection to occur in a population?

Natural selection requires variation in traits within a population, heritability of those traits, and differential reproductive success based on those traits. Without these components, natural selection cannot act on a population.

How can the archaeopteryx go through natural selection?

The Archaeopteryx evolved through natural selection by inheriting beneficial traits that aided in survival and reproduction, such as feathers for insulation and flight. Individuals with these advantageous traits were more likely to survive and pass on their genes to offspring, leading to the evolutionary development of the Archaeopteryx.

How does comparative embryology support natural selection?

Comparative embroyology allows us to see the similarities between embryo's of related species. Therefore, similarities between two organism's in the embryo signal that at some point, those two organism's were related. The earlier those similarities disappear, the farther apart evolutionarily the two organisms are.

What does molecular evidence in natural selection include?

There is an abundant amount of evidence that suggests natural selection. One example that suggests evolution by natural selection is the Peppered moth. Peppered moths were originally white and black. During the Industrial revolution in Britain, the black grime made the darker moths more likely to survive and reproduce than the white moths. During the pre-Industrial period, the moths changed back to being white and white-black.

Who proposed natural selection as a mechanism of evolution?

At the Linnaen Society meeting sometime in 1858 Charles Robert Darwin and Alfred Russel Wallace had both their papers presented before the Society on which they proposed the idea of natural selection as a mechanism of evolution.

Why selection process of HR called negative process?

The selection process in HR is sometimes referred to as a negative process because its primary aim is to eliminate unsuitable candidates rather than select the best one. The process involves screening, interviewing, and assessing candidates to determine if they possess the required skills and qualifications for the job. Through this elimination method, HR can identify the most suitable candidate for the role.

What is the importance of reproduction in natural selection?

Reproduction is crucial for passing on genetic traits to offspring, which allows for the variation necessary for natural selection to occur. Through reproduction, individuals with advantageous traits can pass them on to their offspring, leading to the survival and proliferation of those traits in a population over time. This process drives the adaptation of organisms to their environment through the mechanisms of natural selection.

After reading each selection what was your dominant impression of the theme of continuity and change?

The dominant impression of the theme of continuity and change was the idea that change is inevitable and necessary for progress, but that it is also important to maintain elements of continuity to preserve identity and stability. The balance between honoring traditions and embracing new ways was a common thread throughout the selections.

What are the steps in errors in selection of location?

The steps in errors in the selection of location include lack of thorough research on the target market and competition, not considering demographic trends and customer preferences, failure to assess the accessibility and visibility of the location, and overlooking potential zoning restrictions or legal requirements in the area. These errors can result in poor foot traffic, limited customer base, operational challenges, and potential legal issues that can impact the success of the business.

Drawins theory of natural selection and its parts?

Darwin's theory of natural selection proposes that individuals with advantageous traits are more likely to survive and reproduce, passing their traits on to the next generation. The key components of natural selection include variation in traits within a population, inheritance of traits from parents to offspring, and competition for limited resources leading to differential survival and reproduction based on those traits. Over time, this process can result in the evolution of a population as advantageous traits become more common.

Do you ever see Darwinism in society?

Darwinism's principles of natural selection and survival of the fittest can be observed in certain aspects of society, such as competition in the job market or socioeconomic disparities. However, it's important to remember that human society is shaped by a variety of factors beyond just evolutionary principles.

Why does natural selection only work on phenotypes?

Natural selection is based on the environment and on the traits of organisms. Organisms with more suitable traits are more likely to survive until reproductive age, while organisms with less suitable traits are more likely to die before they can reproduce. Most of these traits are genetic traits. The phenotype is the set of all genetic traits. Natural selection is not determined by genotypes, because genotypes are merely an organism's genetic makeup. Only the dominant or somewhat dominant alleles in the genotype will also appear in the phenotype. However, genotypes still contribute to natural selection indirectly in that two alleles in two parents' genotypes which had not appeared in their phenotypes could be inherited such that they are in the phenotype of the offspring.

What are the six points of Natural selection?

  1. Variation exists within a population.
  2. Some variations are heritable.
  3. Organisms produce more offspring than can survive.
  4. Individuals with advantageous traits are more likely to survive and reproduce.
  5. Over generations, advantageous traits become more common in a population.
  6. This process leads to the adaptation of a population to its environment.

Was evolution around before natural selection?

The concept of evolution existed before the theory of natural selection. Evolution as a concept dates back to ancient Greek philosophers, while natural selection was proposed by Charles Darwin in the 19th century as a mechanism to explain how evolution occurs.

Natural selection is the mechanism which proved species?

Natural selection is the mechanism by which species evolve over time as individuals with advantageous traits are more likely to survive and reproduce, passing on those traits to their offspring. Through this process, species gradually adapt to their environment, leading to changes in their characteristics and behaviors. This drives the diversity and complexity of life on Earth.

What are farmers ideas on natural selection?

Much of "On the Origin of Species" comes from Darwin's studies of farm animals and domestic livestock. While human selection is NOT natural selection, selective breeding can be seen as an accelerated, exaggerated and unnatural version of the same process. Farmers know it works, and were, after all, the ones who started the practice thousands of years ago.

What form of natural selection is shown on a graph as selection against an extreme?

Directional selection is shown on a graph as selection against an extreme. This occurs when individuals at one extreme of a trait distribution have lower fitness than individuals with intermediate phenotypes or those at the opposite extreme. Over time, this can lead to a shift in the average phenotype of a population.