Which of the following is natural selection?When a pregnancy is terminatedWhen animals or plants are bred by humans to produce desired characteristicsWhen humans adapt to their environment, e.g. by wearing clothes for warmthWhen a mutation in an organism that makes it better suited to its environment is passed on to the next generation2Why did the black peppered moth become more prevalent than the white peppered moth during the industrial revolution?The black peppered moth ate the white peppered mothThe black peppered moth could fly faster and therefore escape predatorsThe black peppered moth was better camouflaged against polluted tree barkThe white peppered moth was killed by pollution3Natural selection within a species occurs when advantageous genetic mutations are passed on to the next generation. Which of the following is the best explanation for why this happens?Mutations cause changes in the environment that make breeding more successfulThe mutation can be passed from individual to individual by pathogensIndividuals with the mutation can escape predators more easilyIndividuals with the mutation are more likely to survive and breed successfully 4Why can bacteria evolve more quickly than other species?They are simple unicellular organismsThey reproduce at a fast rateThey are resistant to antibioticsThey have been around for millions of years

Which of the following is natural selection?When a pregnancy is terminatedWhen humans adapt to their environment, e.g. by wearing clothes for warmthWhen a mutation in an organism that makes it better suited to its environment is passed on to the next generationWhen animals or plants are bred by humans to produce desired characteristics

define natural selection and explain the peppered moth example

Which of the following is natural selection?When animals or plants are bred by humans to produce desired characteristicsWhen a mutation in an organism that makes it better suited to its environment is passed on to the next generationWhen humans adapt to their environment, e.g. by wearing clothes for warmthWhen a pregnancy is terminated2What is selective breeding? When one species breeds with another speciesScreening of embryos to detect inherited disordersA process in which animals or plants are bred to produce desired characteristicsA natural process in which beneficial mutations are passed on from parent to offspring3How does selective breeding affect the gene pool of a species? It reduces variation within a speciesIt results in spontaneous mutations It increases variation within a speciesIt results in all individuals within a species having identical genotypes4What is a disadvantage of reduced variation within a species?   It is easier for a species to adapt to environmental changesIt is more difficult for a species to adapt to environmental changesIndividuals within a species will all look the sameDisease will be passed more easily between individuals within a species5Which of these is not a desired characteristic obtained through selective breeding?   Gentle nature in domestic dogsStrong, high-yield crops that mature quicklyBreathing problems in pug dogsHigh milk yield in dairy cows

The peppered moth is often used as a case study to illustrate natural selection.  The allele for dark-colored is dominant and the allele for light colored is recessive.  In the 1850's light-colored moths were higher in population size and easily camouflaged in the trees from predators; however after industrial air pollution covered the trees with soot in the early 1900's the dark-colored moths blended in with the trees more effectively and became greater in number than the light-colored moths.  Which evolutionary trend is demonstrated?Group of answer choicesa smaller percentage of light-colored moths survive to reproduce, shrinking the gene pool and causing mutations.the populations of the light-colored and the dark-colored moths will both become extinct.more dark-colored moths survive to reproduce, which shifted the allele frequency towards the dark-colored allele.over time, the birds will get used to eating the light-colored moths and stop eating the dark-colored moths.

In the peppered moth example, what caused the population to evolve?Group of answer choicesa change in their predatorsthey just wanted to changea change in the environmenta change in their food choice