According to evolutionary theory, organisms with very similar phenotypes: a. are

Question

According to evolutionary theory, organisms with very similar phenotypes: a. are always very closely related b. always have very similar genotypes c. will evolve under very similar conditions. d. can have very different genotypes. e both c and d are correct. Which of the following is NOT supported by scientific evidence? a. Probability Theory b. Evolutionary Theory c. Genetic Theory d. Cell Theory e. all of the above ARE scientific theories supported by large amounts of evidence At the beginning of western settlement millions of buffalo lived on the Great Plains. By 1890 only about 750 survived in the entire country. This is an example of: a. a severe mutation b. negative gene flow c. the founder effect d. a genetic bottleneck. Livestock production in the U.S. today uses nearly 3 times as many antibiotics as are prescribed for all human patients. It is most likely that routine use of antibiotics in animal feed will result in: a. an effective, long term way to eliminate disease-causing bacteria in the animals and therefore increase food production. b. the animals developing resistance to the antibiotics. c. an increased number of antibiotic-resistant bacterial strains. d. the elimination of viral infections and thus increased food production. e. ever fewer disease-causing bacteria in the environment.

Explanation / Answer

1. d. can have very different genotypes.
Eg.TT and Tt both have same phenotype.

2. e. All of the above

Scientific evidence is evidence which serves to either support or counter a scientific theory or hypothesis. Such evidence is expected to be interpretation in accordance with scientific method. From this aspect all of the above are scientific theories supported by large amount of evidence.

3. d. A genetic bottleneck effect.

Genetic bottleneck is a sharp reduction in the size of a population due to environmental events (such as earthquakes, floods, fires, disease, or droughts) or human activities (such as genocide). Here population abruptly decreases from millions to 750. That’s why it is bottleneck effect.

4. a. An effective, long term way to eliminate disease causing bacteria in the animals and therefore increase food production.

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