EXAM 205 - BIOS 205 EXAM 1 fall 2006 A On the scantron(your...

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BIOS 205 EXAM 1 fall 2006 On the scantron (your answer sheet) use a number 2 pencil to: 1. fill in form A 2. fill in your name 3. fill in an ID number of your choosing and by which we may post your exam score. The number needs to be at least 6 digits long. Begin it all the way over to the left of the 9 spaces allotted and do NOT include any letters. 4. Blacken in the best choice for each of the questions below. On this question sheet, You may write on it. You will turn it in. 1. The nonfunctional, very reduced digestive tract of some parasites is an example of A. an exaptation (= a preadaptation). B. a zygote. C. a blastula. D. a phylogeny. *E. a vestigial trait. 2. Both birds and insects generally have wings. But the wings develop differently in the two groups: insect wings develop from extensions off of the limb, whereas the wings of birds develop from the entire limb. Wings in birds and insects are an example of *A. analogous structures. B. homologous structures. C. gene flow. D. phylogeny structures. E. Pangaea. 3. Which of the following pieces of evidence most strongly supports the common origin of all life on Earth? *B. all organisms use essentially the same genetic code 4. The oldest fossil that has been discovered is approximately ___________ years old and is what type of cell? *E. 3.5 billion; prokaryotic 5. Gene flow is a concept best used to describe an exchange between *D. populations A
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B. very low consumption of resources. C. also called autotrophism. D. also called heterotrophism. E. when people drive greater and greater distances between home and work. 7. A taxonomist tells you that the species you are holding belongs in the Kingdom Protista. Given this information, this species A. is a bacterium. B. is a moneran. C. is prokaryotic. *D. is eukaryotic. E. A, B, and C 8. Imagine a small isolated population of alpine plants. Some of the plants have leaves with smooth edges and some have leaves with scalloped (not smooth) edges. If this difference in phenotype lacks a genetic component (i.e., is not due to a difference in their DNA sequences), then *A. the environment can affect the relative abundance of plants with smooth leaves. B. any change in the relative abundance of plants with smooth leaves must be the result of natural selection. C. any change in the relative abundance of plants with smooth leaves must be an example of evolution. D. any change in the relative abundance of plants with smooth leaves must be an example of gene flow.
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