Unformatted text preview: Bio 201 Spring 2010 exam 2 practice questions 1 [Answers are at the end.] 1. Dioecious species: (a) have male and female individuals each with unisexual flowers (b) usually bear perfect flowers (c) have diploid gametophytes that produce gametes (d) do not have gametophytes (e) include hermaphrodites 2. Endosperm in a corn kernel contains (a) chloroplasts (b) protective toxins (c) waxy cuticle (d) starch (e) stored metal ions 3. The most frequent type of biological mutualism is (a) parasite‐host (b) plant‐seed disperser (c) plant‐pollinator (d) plant‐mycorrhizae (e) plant‐seed predator 4. Plants that are pollinated by bats at night attract the bats by means of (a) strong odors (b) flowers with complex structures (c) bright colors (d) dim colors (e) insect prey 5. Phloem functions primarily in (a) adding structural support to a plant (b) protection against water loss (c) facilitating gas exchange (d) protection against UV radiation (e) transport of nutrients 6. Some plants evolved a carnivorous lifestyle in order to (a) discourage herbivores from feeding on the plant (b) obtain more nitrogen (c) protect themselves against parasites (d) obtain more carbon (e) survive drought conditions Bio 201 Spring 2010 exam 2 practice questions 2 7. Most parasitic plants are (a) carnivores (b) algae (c) autotrophs (d) soil‐dwelling (e) mutualists 8. In plants, cold hardening increases unsaturated fatty acid content in cell membranes. Why is this change beneficial at low temperatures? (a) Unsaturated fatty acids have no (C=C) double bonds and cause an increase in membrane fluidity (b) Unsaturated fatty acids have at least one (C=C) double bonds and cause a decrease in membrane fluidity (c) Unsaturated fatty acids have at least one (C=C) double bonds and cause an increase in membrane fluidity (d) Unsaturated fatty acids have no (C=C) double bonds and cause a decrease in membrane fluidity (e) Unsaturated fatty acids can have only cis (C=C) double bonds which have a lower freezing temperature than trans double bonds 9. A type I survivorship curve is characterized mainly by (a) a linear mortality rate (b) most mortality occurring late in life (c) most mortality occurring early in life (d) life histories of plants (e) life histories of marine invertebrates 10. When a population reaches the carrying capacity (a) the number of births equals the number of deaths (b) potassium is limited in the environment (c) the population is growing at its maximum rate (d) predators and prey are in equilibrium (e) the number of births exceeds the number of deaths 11. Which of the following was observed in the experiment with the small arthropod community living on moss? (a) the arthropods always went extinct (b) the arthropods adapted quickly in small patches (c) high extinction rates were seen in small patches (d) connecting patches was detrimental for survival (e) small patches supported more species than larger patches 12. Mullerian mimicry occurs when: (a) two or more poisonous species have similar warning coloration Bio 201 Spring 2010 exam 2 practice questions 3 (b) one or more non‐poisonous species resembles a species that is poisonous (c) an organism avoids notice by resembling a non‐food object in its environment (d) two predators compete for the same prey species (e) an herbivore mimics its plant host 13. Megapode birds in Australia and Asia are not found on some islands because (a) trees are not present (b) typhoons destroy their habitats (c) humans hunt them (d) egg predators eliminate them (e) pollution is too high 14. Humans contract cholera by (a) touching an infected person (b) sexual contact (c) drinking contaminated water (d) getting bitten by an infected animal (e) eating infected meat 15. Secondary chemicals that plants use as defense compounds are (a) the same compounds that they use for photosynthesis (b) obtained from herbivorous insects (c) used to attract other plants (d) usually molecules that diffuse from their roots (e) not part of their primary metabolic pathways answers: 1a, 2d, 3c, 4a, 5e, 6b, 7c, 8c, 9b, 10a, 11c, 12a, 13d, 14c, 15e ...
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This note was uploaded on 04/17/2010 for the course BIO 201 taught by Professor True during the Spring '08 term at SUNY Stony Brook.
- Spring '08