All of the answers, except answer choice (a. a. Of the following, which is NOT part of Darwin's theory of natural selection? Charles Darwin's theory of evolution by natural selection explains each of the following except how a) species can become extinct. Balancing selection refers to a number of selective processes by which multiple alleles (different versions of a gene) are actively maintained in the gene pool of a population at frequencies larger than expected from genetic drift alone. - Gene flow causes the frequency of the brown allele to increase. ), involve some form of natural selection. D. asked by Rima on September 25, 2014; Language A B. Cricket Frogs prefer to sleep during the day, while Red-eyed Tree Frogs prefer to sleep during the night. Which of the following is necessary for natural selection? It is the differential survival and reproduction of individual due to the difference in the phenotype. B. carbon cycles through ecosystem. When bacteria cause an infection and the individual is treated with antibiotics, any bacteria that have the antibiotic-resistance trait will survive while all others will die off. A directional selection is a force in nature that causes a population to evolve towards one end of a trait spectrum. What statement best explains the relationship between evolution and natural selection? - Natural selection causes the frequency of the brown allele to increase. answer choices Suitable variations in a population tend to be passed on while unsuitable variations in a population are not. In this example, a group of mice with heritable variation in fur color (black vs. tan) has just moved into a new area where the rocks are black. 1. Natural selection is the process by which organisms with certain characteristics are preferentially selected by nature.This means that those organisms possessing certain characteristics will survive and reproduce better. Directional Selection Definition. Natural selection is a process by which a species changes over time in response to changes in the environment, or competition between organisms, in order for the species to survive.

genetic variation in species. b. Which of the following is an example of natural selection? Over time, this process results in populations which are better adapted to their environment as they tend to survive and produce new offspring. Natural selection. - This is an example of genetic drift. which of the following is an example of an effect of natural selection. Natural selection, process in which an organism adapts to its environment through selectively reproducing changes in its genotype. This environment features hawks, which like to eat mice and can see the tan ones more easily than the black ones against the black rock. Which of the following is an example of natural selection. It ensures some organisms can survive an environmental change. With natural selection "picking" is due to the fit of an organism with its environment; whereas in artificial selection, the breeder "picks" which organisms will breed. A. all of the children of two parents are male. C. favorable environmental conditions cause an increased food supply.

b) evolution takes place in the natural world. As the fish in their area start to die out, a flock of penguins moves to a different part of the ocean Natural selection can take many forms. When the mating season is over, a male deer sheds its antlers. Pesticides are sprayed in a field, resulting in an increase in crop growth and a decrease in insect population. One example of natural selection in bacteria is the development of antibiotic resistance. B. To make natural selection more concrete, let's consider a simplified, hypothetical example.

The proliferation of antibiotic-resistant bacteria is a major medical problem. What is the BEST describes the benefit of variation within a species? Natural selection depends upon the presence of variation, artificial selection does not. This can happen by various mechanisms, in particular, when the heterozygotes for the alleles under consideration have a higher fitness than the homozygote. Use this quiz to practice for the Unit 8 test on Natural Selection A. To make talking about this easier, we will consider the distribution of traits across a population in graphical form. - Gene flow causes the … Evolution occurs by natural selection .


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