Which conditions are always true of populations evolving due to natural selection?

1.Which of these statements describes the effects of natural selection on a population? A. Pushes traits towards an extreme. B. Adapts organisms to their environment. C. Generally reduces genetic variation over time. D. Is responsible for differential reproduction and frequency of certain genotypes. E. All of these accurately describe natural selection. 2. Organisms cannot evolve particular features because those features could provide an advantage to them. This reflects _____. A. the limits of historical constraints B. the inability to compromise C. the consequences of inbreeding D. the consequences of random mutations 3. In a population a gene has two alleles, A and a, that are in equilibrium. The frequency of allele a is 0.2. What is the frequency of individuals that are homozygous for the A allele? A. 0.8 B. 0.04 C. 0.16 D. 0.64 E. 1.0

English naturalist Charles Darwin developed the idea of natural selection after a five-year voyage to study plants, animals, and fossils in South America and on islands in the Pacific. In 1859, he brought the idea of natural selection to the attention of the world in his best-selling book, On the Origin of Species.

Natural selection is the process through which populations of living organisms adapt and change. Individuals in a population are naturally variable, meaning that they are all different in some ways. This variation means that some individuals have traits better suited to the environment than others. Individuals with adaptive traits—traits that give them some advantage—are more likely to survive and reproduce. These individuals then pass the adaptive traits on to their offspring. Over time, these advantageous traits become more common in the population. Through this process of natural selection, favorable traits are transmitted through generations.

Natural selection can lead to speciation, where one species gives rise to a new and distinctly different species. It is one of the processes that drives evolution and helps to explain the diversity of life on Earth.

Darwin chose the name natural selection to contrast with “artificial selection,” or selective breeding that is controlled by humans. He pointed to the pastime of pigeon breeding, a popular hobby in his day, as an example of artificial selection. By choosing which pigeons mated with others, hobbyists created distinct pigeon breeds, with fancy feathers or acrobatic flight, that were different from wild pigeons.

Darwin and other scientists of his day argued that a process much like artificial selection happened in nature, without any human intervention. He argued that natural selection explained how a wide variety of life forms developed over time from a single common ancestor.

Darwin did not know that genes existed, but he could see that many traits are heritable—passed from parents to offspring.

Mutations are changes in the structure of the molecules that make up genes, called DNA. The mutation of genes is an important source of genetic variation within a population. Mutations can be random (for example, when replicating cells make an error while copying DNA), or happen as a result of exposure to something in the environment, like harmful chemicals or radiation.

Mutations can be harmful, neutral, or sometimes helpful, resulting in a new, advantageous trait. When mutations occur in germ cells (eggs and sperm), they can be passed on to offspring.

If the environment changes rapidly, some species may not be able to adapt fast enough through natural selection. Through studying the fossil record, we know that many of the organisms that once lived on Earth are now extinct. Dinosaurs are one example. An invasive species, a disease organism, a catastrophic environmental change, or a highly successful predator can all contribute to the extinction of species.

Today, human actions such as overhunting and the destruction of habitats are the main cause of extinctions. Extinctions seem to be occurring at a much faster rate today than they did in the past, as shown in the fossil record.

97.Which of these conditions are always true of populations evolving due to natural selection?Section:22.2Condition 1: The population must vary in traits that are heritable.Condition 2: Some heritable traits must increase reproductive success.Condition 3: Individuals pass on most traits that they acquire during their lifetime.A)Condition 1 onlyB)Condition 2 onlyC)Conditions 1 and 2D)Conditions 2 and 3

98.Which one of the following statements best defines artificial selection?Section:22.2

Get answer to your question and much more

99.Which statement illustrates the connection between natural selection and overreproduction of a population?Section:22.2

Get answer to your question and much more

100.Darwin used the phrase "descent with modification" to explain ________.Section:22.2

Get answer to your question and much more

101.Which of the following statements describeevolution?Section:22.2A)Individuals evolve in response to their environment.B)The match between organism and their environment decreases.C)Natural selection chooses the most popular trait.D)Quick changes occur in an individual's phenotype.

What is true of a population for natural selection to occur?

Which of these conditions are always true of populations evolving due to natural selection choose all that are correct?

What are the 4 conditions of natural selection?

What are the 3 conditions that must be true for natural selection to occur?