1) Because of prolonged drought, the trees on an island are producing nuts that
ID: 49426 • Letter: 1
Question
1) Because of prolonged drought, the trees on an island are producing nuts that are much smaller with thicker and harder shells. What will happen to the birds that depend on the nuts for food?
2) Define and compare natural and artificial selection, including the source of selection pressure and the traits selected for. Provide a specific example of each.
3) What is speciation in general? Briefly describe the difference between allopatric speciation and sympatric speciation. Be sure to include under what sort of conditions each type might occur.
Explanation / Answer
1. birds which were previously adapted for a different kind of nut , will have now problem in breaking them and using them as food.
3. Speciation is the evolutionary process by which new biological species arise. The biologist Orator F. Cook was the first to coin the term 'speciation' for the splitting of lineages or "cladogenesis," as opposed to "anagenesis" or "phyletic evolution" occurring within lineages.
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