BIOLOGY 262, FALL 2001TAKE-HOME EXAMINATION #1 (PART 1)Name Date MULTIPLE CHOICE.For the following multiple choice questions circle the letter in front of theresponse that best answers the question or completes the sentence. (20%, 2% each)1. Which of the following is NOT anassumption of scientific philosophy?a. Different events can have the samecause.b. Experimental observations can provehypotheses to be true.c. Sense experience reflects reality.d. There is order in the universe.e. None of the above. (All are assumptions ofscientific philosophy)2. Which of the following is deriving ageneralization from separate observations?a. Deductionb. Inductionc. Rejectiond. Supporte. None of the above3. Which of the following best describesyour ecological relationship to a sunflowerseed as you eat it?a. Commensalistb. Ectoparasitec. Grazerd. Parasitoide. Predator4. What occurs at 30º North and Southlatitude that causes deserts to form there?a. Air blows off of the oceans there.b. Sunlight hits the earth most directlythere.c. The earth's axis is tilted 30º.d. Warm air rises and cools there.e. None of the above5. Which of the following can fix nitrogen?a. Some animalsb. Some bacteriac. Some plantsd. All organisms can fix nitrogene. No organisms can fix nitrogen6. Currently, what is the most-significantcause of species becoming endangered?a. Commercial overexploitationb. Effects of exotic organismc. Habitat alteration (destruction)d. Recreational disturbance &overexploitatione. None of the above7. Which of the following best describes thecoloration of a bright venomous snake?a. Aposematicb. Commensalc. Crypticd. Cyanotice. None of the above8. If a population of 100 is undergoingexponential growth with a yearly intrinsicrate of increase of 0.1, then what is thesize of the population after 2 years?a. 101b. 110c. 120d. 220e. None of the above9. Which of the following is TRUE abouthuman endoparasites?a. Most have complex nervous systems.b. Most are closely related to oceanliving or tidal mud-flat organisms.c. They always kill unmedicated hosts.d. They are usually smaller than theirfree-living relatives.e. None of the above10. Which of the following is required toavoid extinction of a sink population?a. Immigrationb. Emigrationc. Seasonal variabilityd. Very high quality habitate. None of the aboveMATCHING.For the following exercise match the characteristics in the right column with thecorresponding biome or environment in the left column. Each letter may be used more than onceor not at all. The space on the left indicate the numbes of correct answers. (9%, 1% each)1. Coniferous forest 2. Savanna 3. Temperate forest 4. Temperate grassland 5. Tropical forest A. CanopyB. Hot and wet climateC. Large herds of large animalsD. Leaf litter forms deep nutrient-rich soilE. Seasonal fires commonFILL-IN-THE-BLANK.For the following exercises write the appropriate word or words in theavailable space.(21%)1. Label the two zones of the oceanindicated in the figure below. (2%)AB Cocean floor oceanA. B. C. 2. Sketch and correctly label the Carboncycle (C). Be certain to indicate wherecarbon is obtained at each stage, labelthe kinds of organisms involved, andindicate where fixation occurs. (6%)3. Label the three survivorship curvesbelow with the appropriate type. (3%)log%survivorsRelative Age4. Give an example of an organism thatapproximately exhibits each type ofsurvivorship. (Identify the type of survivorshipfor each example.) (3%) 5. Sketch and correctly label a typicalbiomass "pyramid" for a surface-water, oceanic ecosystem. Include thenames of at least 3 trophic levels. (6%)BIOLOGY 262, FALL 2001TAKE-HOME EXAMINATION #1 (PART 2)Name Date DEFINITIONS.For the following BIOLOGICAL words or phrases define them as accuratelyand concisely as possible. (20%, 4%)1. Science:2. Biodiversity Crisis:3. Biological Succession:4. Estuary:5. Population:SHORT ANSWER/PROBLEMS. Address each question in as concise and lucid a manner aspossible. (10%)1. A population of 100,000 individuals is growing logistically and has a yearly intrinsic rate ofincrease of 0.4. The carrying capacity is 200,000. What is the size of this population after oneyear? After two years? (Be sure to write down any equations you used.) (6%)2. Briefly explain how the human population has grown in the last 1000 years. What occurrencemost seriously reduced the human population size in the last 1000 years? Why haven't otherevents such as World War Two resulted in equally dramatic population reductions? (Feel freeto sketch a graph showing human population growth.) (4%)SHORT ESSAYS.For the following essays, address each question in as concise and lucid amanner as possible. Do NOT exceed the space provided. (20%)1. The antibiotic penicillin is known to kill the bacterium Staphylococcus aureus. Design arigorous experiment to test the hypothesis that penicillin will kill Escherichia coli (AKA.E. coli). Be certain to include the two types of control discussed in class. The penicillin youwill use is dissolved in a water solution and the bacteria are grown on semi-solid nutrientmedium in Petri plates. (Feel free to include drawings to SUPPLEMENT your answer.)(10%)2. Explain why having a parasite does not necessarily mean a person has a disease. What types ofparasites are least likely to cause disease and why? What types of parasites are most likely tocause disease and why?
View Full Document
Unlocking...