BIO 311D_Exam2_KEYv2

BIO 311D_Exam2_KEYv2 - Bio 311D - Exam 2 Introductory...

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Bio 311D - Exam 2 Introductory Biology II Spring 2008 Name: ________________________________________ EID:_________________ Select the best answer for the following questions and fill in the corresponding bubble on the answer sheet in PENCIL. Please answer the short answer and essay questions directly on your exam in PEN (if you wish to be considered for regrade-ing). Take a deep breath – and Good Luck!! Multiple Choice (2pts each) 1. You are researcher trying to construct a molecular-based phylogeny of the entire animal kingdom. Assuming that none of the following genes is absolutely conserved, which of the following would be the best choice on which to base the phylogeny? A) genes involved in chitin synthesis B) collagen genes C) genes involved in bone formation D) hemoglobin genes 2. What distinguishes a coelomate animal from a pseudocoelomate animal is that coelomates A) have a body cavity, whereas pseudocoelomates have a solid body. B) contain tissues derived from mesoderm, whereas pseudocoelomates have no such tissue. C) have a body cavity completely lined by mesodermal tissue, whereas pseudocoelomates do not. D) have a complete digestive system with mouth and anus, whereas pseudocoelomates have a digestive tract with only one opening. 3. Why must multicellular organisms keep their cells bathed in an aqueous medium? A) Negative feedback will only operate in interstitial fluids. B) Cells need an aqueous medium for the exchange of nutrients, gases, and wastes. C) Cells of multicellular organisms tend to lose water because of osmosis. D) Cells of multicellular organisms tend to accumulate wastes, a consequence of diffusion. 4. The epithelium tissue best adapted for a body surface requiring rapid cell turnover is ____________, while the epithelial tissue best adapted for absorption of nutrients is ___________. A) simple squamous, simple columnar. B) simple cuboidal, stratified squamous. C) stratified columnar, simple columnar. D) stratified squamous, simple columnar. 5. If you gently twist your earlobe, __________ fibers keep it attached to your head (thank goodness), while __________fibers prevent your ear from remaining distorted after you let go. A) elastin fibers, reticular fibers B) fibrin fibers, collagenous fibers C) collagenous fibers, elastin fibers D) reticular fibers, loose connective tissue 1
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Bio 311D - Exam 2 Introductory Biology II Spring 2008 6. Which example best describes a homeostatic control system? A) The core body temperature of a runner is allowed to gradually rise from 37°C to 45°C. B) The kidneys excrete salt into the urine when dietary salt levels rise. C) A blood cell shrinks when placed in a solution of salt and water. D) The blood pressure increases in response to an increase in blood volume. 7. Which of the following is an example of positive feedback?
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This note was uploaded on 10/10/2011 for the course AMS 310 taught by Professor Benke during the Spring '11 term at UT Arlington.

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BIO 311D_Exam2_KEYv2 - Bio 311D - Exam 2 Introductory...

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