2009%20mid-term%20ver%201

2009%20mid-term%20ver%201 - BILD 3, Spring 2009. Dr. Kohn...

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BILD 3, Spring 2009. Dr. Kohn Mid-term Page 1 Section/TA _______________________ Name_______________________ QUESTIONS WITH STRIKETHROUGH ARE ON MATERIAL THAT WILL NOT BE COVERED BEFORE THE MID-TERM. Directions: There are 9 pages in this exam, not including this cover sheet. Please put your name on each page. Only exams written in ink will be accepted for regrades. The exam is closed book and closed notes and no calculators may be used. There are 37 questions . Please be sure your exam is complete. Read each question carefully. Think before you write and confine your answer to the space provided. You can use the bottom of this page for scratch, but nothing written on this page will be graded. We will collect exams promptly at 12:20. Page 2. Page 3. Page 4. Page 5. Page 6. Page 7. Page 8. Page 9. Page 10. Total (Space below this line for scratch)1
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BILD 3, Spring 2009. Dr. Kohn Mid-term Page 2 Section/TA _______________________ Name_______________________ 1. (4pts) If you go to the nursery to buy a bryophyte the bulk of your purchase is a. haploid gametophyte b. diploid sporophyte c. haploid sporophyte d. nonvascular seed plant e. plant with flowers hidden on the underside of the leaves 2. (4pts) Which of the following is not a potential premating isolating mechanism? a. courtship display b. breeding season c. sperm-egg incompatibilities d. male breeding plumage e. non overlapping geographic ranges 3. (6pts) Name one of the three reasons discussed in class for why we observe a Cambrian Explosion of diversity in the fossil record. 4. (4pts) Define a paraphyletic group and explain why dinosaurs are paraphyletic.? 5. (2pts) Which of the following is not a true statement about the xylem. a. The cell walls are strengthened with cellulose and lignin b. It consists of living cells. c. It conducts most of the water and minerals through the plant. 6. (2pts) True/False (circle one) Aerobic prokaryotes originated before cyanobacterias. 7. (6pts) Why is it advantageous for the bacterium Wolbachia (which
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BILD 3, Spring 2009. Dr. Kohn Mid-term Page 3 Section/TA _______________________ Name_______________________ infects mosquitoes) to cause cytoplasmic incompatibility whereby matings between infected male and uninfected female mosquitoes are sterile? 8. (2pts) In which of the following types of phylogenetic trees do the branch lengths represent a direct estimate of time: a) Cladograms b) Phylograms c) Ultrametric Trees 9. (4pts) Plants X and Y are reproductively isolated, and the reproductive barrier between X and Y is thought to have arisen to prevent the production of unfit hybrids. The best evidence to support this hypothesis would be finding greater prezygotic reproductive
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This note was uploaded on 12/01/2010 for the course BIO BILD 3 taught by Professor Christopherwills during the Fall '10 term at UCSD.

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2009%20mid-term%20ver%201 - BILD 3, Spring 2009. Dr. Kohn...

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