For each of the statements below, label it (a) if it is a group selectionist hyp
ID: 18843 • Letter: F
Question
For each of the statements below, label it (a) if it is a group selectionist hypothesis and (b) if it is a Darwinian natural selectionist hypothesis. (2 points each).6. Lemmings leave where they are living when population densities get very high because they have better chances of reproducing in places where the population density is lower.
7. Lemmings leave where they are living when population densities get very high because as the dispersing lemmings die off, they leave the species in the hands of the best survivors, which enables selection to work, improving the lemmings as a whole.
8. Lemmings leave where they are living when population densities get very high because high densities threaten the survival of the local population, which favors a reduction in the number of lemmings present there.
9. Lemmings leave where they are living when population densities get very high because the fighting that takes place at high densities threatens to injure the males and females of highest genetic quality, which is harmful to the gene pool.
10. Lemmings leave where they are living when population densities get very high because the risk of inbreeding increases at high population densities, which favors males and females that disperse to find genetically dissimilar mates in other areas.
Explanation / Answer
6.A since it favors the group as a whole but not due to an individual being more fit than another 7.B since it favors the fittest individuals classic Darwinism example 8.A since does not favor any specific type of organism in the species that is more fit than others 9.B since it talks about harming the most fit organisms and hence hurting the population as a whole. it would be similar if it talked about killing off all the less fit organisms and this being good for the population 10. A since non of the individuals that leave and reproduce more do so because they are better fit, but their actions do help the group population as a whole
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