Copy and complete the table to compare artificial selection with natural selection.
Natural selection
Artificial selection
The selective agent is the total environment of the organism
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Adaptations to the prevailing conditions are selected
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Many traits contributing to fitness are selected
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Important Questions on Selection and Evolution
In the classic experiment by Emerson and East, the Black Mexican parents were homozygous at all gene loci affecting cob length. What caused the variation in their cob length?
In the table, was the variation in the cob length of the F1 generation caused by genes, environment or both? Explain your answer.
Was the variation in cob length of the F2 generation caused by genes, environment or both? Explain your answer.
Skomer is a small island off the coast of Wales. Rabbits have been living on the island for many years. There are no predators on the island.
Rabbits on Skomer are not all agouti. There are quite large numbers of rabbits of different colors, such as black and white. Suggest why this is so.
Skomer is a small island off the coast of Wales. Rabbits have been living on the island for many years. There are no predators on the island.
Suggest what might be important selection pressures acting on rabbits on skomer.
From the given graph, describe the trends in deaths from all types of S.aureus between 1993 and 2012.
Describe the differences between the trends in death form meticillin-resistant S.aureus (MRSA) and non-resistant S.aureus.
