Using the Galapagos finches as an example, answer the following questions: I. Why are there only three species of finches on the mainland of South America and up to 16 different species of finches on the Islands? II. Describe the mechanism by which the original population of finches arrived on the islands.
Using the Galapagos finches as an example, answer the following questions: I. Why are there only three species of finches on the mainland of South America and up to 16 different species of finches on the Islands? II. Describe the mechanism by which the original population of finches arrived on the islands.
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Transcribed Image Text:2. Using the Galapagos finches as an example, answer the following questions:
I. Why are there only three species of finches on the mainland of South America
and up to 16 different species of finches on the Islands?
II. Describe the mechanism by which the original population of finches arrived on
the islands.
III. An original population of finches on Daphne Island is polymorphic when it comes
to beak sizes. (this population feeds on seeds of varying sizes from different
species of plants). At first the beak size variations and their main food source
were as follows:
Small beak/small seeds 25%
Medium beak/medium seeds 50%
Large beak / large 25%
a. Draw a graph of the original population and their beak size/percentage.
(Assume this is the original population with plenty of food sources for each).
b. A 10-year drought hit the island which kills the plants that produce both the
small seeds and the medium size seeds. Describe the allele frequency shift
and draw a graph to show the difference in the beak sizes at the end of the ten
years. Draw a graph representing your hypothesis.
What type of selection would this be?
c.
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