exam4+summer94

exam4+summer94 - 1. You are studying a small population...

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Unformatted text preview: 1. You are studying a small population (less than 100 individuals) of a little know Species of butterfly. Over many generations you observe an increase in the frequency of the blue-winged phenotype compared to the white-winged phenotype. What can you conclude from this? A. the population is evolving B. the population is in genetic equilibrium C. the blue-winged phenotype is dominant to the white-winged phenotype D. the blue-winged phenotype is selectively superior to the white-winged phenotype E. the p0pulation is changing as a result of gene flow 2. As a general rule about how much of the energy captured by one trophic level is available to the next higher trophic level? A. 90% B. 70% C. 50% D. 30% E. 10% 3. Which of the following figures represents population growth under limiting (natural) conditions? I I I l | | 1V V Number of lndhfiduab fl/ff’fd ///,/” TIME dividuals within a population share a common: A. genotype B. phenotype C. gene pool D. habitat E. mutation 5. In a population subjected to directional selection the average phenotype would be expected to , while the amount of phenotypic variation would . change, decrease . change, remain the same . change, increase . remain the same, decrease remain the same, increase WUOW> Page: 1 10. ll. . All of the energy captured by an ecosystem is captured by the: . primary producers . primary consumers . secondary consumers . tertiary consumers more than one of the above meow» . What is the probability of a heterozygous individual producing a gamete containing a recessive allele? A. 0% B. 25% C. 50% D. 75% E. 100% . Ifthe secondary consumers assimilate 350 Kcal/mzlyr how much energy was assimilated by the primary producers? ' A. 35 Kcal/mzlyr B . 350 Kcal/mzlyr C. 3,500 Kcal/mzlyr‘ D. 35,000 Kcal/mzlyr B. 350,000 Kcal/m2/yr . The Biological Specie's Concept suggests that individuals of two different species cannot: A. mate B . mate and produce a zygote C. mate and produce a non-viable (unhealthy) offspring D. mate and produce a viable, but sterile, offspring E. mate and produce completely viable and fertile offspring The movement of nutrients in an ecosystem is very different from the movement of energy because: A. the quantity of nutrients is not important to organisms B . nutrients are cycled within the ecosystem and energy flows through C. energy can be captured by all trophic levels, whereas nutrients can't be D. not all forms of energy can be captured, but all forms of nutrients can be E. more than one of the above is correct When the number of individuals in a population exceeds the carrying capacity the rate of growth of the population is expected to: . increase rapidly . increase slowly . remain constant . decrease slowly become negative wonw> Page: 2 12. 13. 14. 15. 16. 17. 18. Secondary succession differs from primary succession in that it begins with present. ' A. bare rock B . soil C. all the plants D. all the animals E. all organisms being One example of the power of selection in terms of modifying phenotypes is: A. the similarity in organic molecules found in biological systems B . the similarity in the development of related species C. the diversity of the breeds of dogs or other domesticated animals D. the diversity of organisms found in the fossil record E. none of the above is correct New genetic variation ultimately arises as the result of: A. mutation B. natural selection C. genetic equilibrium D. heterozygote superiority E. sexual reproduction The burning of fossil fuels has caused a decrease in the pH of precipitation in many parts of the world. This acid precipitation is mostly due to releases of: . carbon dioxide . water vapor . sulfur dioxide . steam hydrogen i g mcnw> e global distribution of terrestrial biomes is due mostly to a global pattern of: . nutrients . climate . aquatic systems . gravity elevation density-dependent factor which influences population growth would be: . a flood . a hurricane . a tornado . predation a drought muow>> munw> A trait which exhibited continuous variation in a population (one in which there are not discrete phenotypes) would mostly likely be controlled by? . multiple alleles . epistatic genes . lethal alleles . a single gene multiple genes monw> Page: 3 19. Which of the following does not have an influence on evolution? A. mutation B. population size C. purely phenotypic variation D. genetic variation E. sexual reproduction 20. The individuals within separate populations may all be. maintained asmembers of the same species 21. 23. 24. 25. meow>a through: . evolution . genetic equlibrium . extrinsic barriers . intrinsic barriers gene flow menw> When the population size is small and the carrying capacity is large the term (K-N)IK approximates - and the population growth approximates ' . 0, exponential growth . 0, a horizontal line . l, logistic growth . 1, exponential growth . 1, a horizontal line lTlUOUJ> air in the atmosphere cools it tends to and it can hold moisture. . sink, less . sink, more ' . rise, less . rise, more - rise, the same amount of l" arge scale habitat disturbances may result in: . more rapid cycling of nutrients . increasing the total quantity of a nutrient in the ecosystem . a loss of nutrients from the ecosystem . an increase in the primary productivity of the ecosystem more than one of the above is correct moow> At high latitudes the sunlight is variable than at the equator. A. less, less B. less, more C. more, less D. more, more B. the same intensity and seasonal variabiltiy intense and seasonally In a population of 1000 individuals, in which 190 express the dominant phenotype and 810 express the recessive phenotype, what is the frequency of the dominant allele? A. 0.1 B . 0.18 C. 0.19 D. 0.44 E. 0.81 Page: 4 26. 27. 28. 29. 30. 31. The theory of punctuated equilibrium suggets that: . organisms slowly accumulate change . all natural populations are in genetic equilibrium . large amounts of change can occur very rapidly . genetic variation is not important in the evolutionary process natural selection is not an important factor in the evolutionary process mcnw> Which of the structures below contains bones that analogous to the bones in the humanzarm? . front flippers in seals . front fins in fishes . wings of birds . wings of bats more than one of the above isanalogous wuow> Based on the rates of immigration and extinction of islands, a small island would be expected to conatin species than a large island and an island close to the mainland would be expected to contain species than an island far from the mainland. . fewer, fewer . fewer, more . more, fewer . more, more. none of the above is correct H meow» he primary consumers feed directly on and are feed upon by . sunlight, primary producers . primary producers, secondary consumers . secondary consumers, tertiary consumers . primary producers, tertiary consumers tertiary consumers, secondary consumers monw> Exam Break Question. Of the topics listed below which did you find most difficult? All answers will be accepted for this question. organic molecules and chemical reactions cellular respiration and photosynthesis DNA and protein synthesis Mendelian genetics evolution and speciation 11> B. C. D. E. Species with similar niches are often not found in the same locations because of the high levels of: A. predation B . competition C. parasitism D. symbiosis Page: 5 32. Based on the Table below which community would you expect to have the greatest number of species present? 09 U) swam >s snow? Community <ZBI‘JH <2Elfi" organisms random colonization events 0.5% 1.5% 35.5% 91.5% 99.5% Percentage of Total Area Disturbed e "tolerance hypothesis" suggests that succession is due to: . one group of organisms altering the environment to make it more suitable for another group of . differential growth rates and longevity of organisms . some organisms inhibiting colonization of an area by other organisms . random changes in the structure of a community 34. Which of the following would lead to the maintenance of genetic variation within a population? muow> . epistasis . polygenic inheritence . incomplete dominance . heterozygote superiority . multiple alleles 35. A species, with a total of 36 chromosomes, that was the result of autopolyploidy (sympatric speciation) most likey arose from which of the following species? moow> . species 1 . species 2 . species 3 . species 4 species 5 Species LII-lib)th Wes 4 8 12 18 24 Page: 6 310 36. 37. 38. 39. 40. 41. 42. Which of the following statements about genetic equilibrium is not correct? 0 meow»; wonw> monw> . Small populations are not in genetic equilibrium . allele frequencies do not change from one generation to the next . populations must have no gene flow in order to be in genetic equilibrium . a population that is in genetic equilibrium is also evolving there must be no natural selection ocwrring in the population e biotic potential,"r", of a species can be influenced by: . predation . nutrients present in the ecosystem . the amount of sunlight in the ecosystem . competition age of first reproduction ompared to either Carbon or Phosphorous the Nitrogen cycle is different in that: . it has an atmospheric component . it can move between organisms easily . it can cycle rapidly once in organisms . is has no geological (sedimentary rock) component to its cycle more than one of the above is correct Evolution occurs when: A. B. C. D. E. the genotype of an individual changes during that individuals lifetime the genotype of an individual changes in its somatic cells the gene pool of a population changes within a generation the gene pool of a population changes from one generation to the next the gene pool of a population does not change The human population is growing very rapidly, much of this is due to a/an: A. o meow monw> increase in the number of babies being born to individuals . increase in infant mortality (death) rates . decrease in overall mortality (death) rates . decrease in the number of babies being born to individuals decrease in the age of first reproduction more than one of the above is correct enetic variation within a population can be increased through which of the following processes? . sexual reproduction . genetic recombination . translocatio‘ns . crossing-over Before two populations can undergo significant genetic divergence which of the following must be prevented? moom> . mutation . natural selection . gene flow . evolution more than one of the above Page: 7 43. In a population, where the allele frequencies are H=O.6 and h=0.4, what is the expected frequency 45. 46. 47. 48. 49. of heterozygous individuals? . individual organisms / . populations . communities . several populations energy _F“U0W>F§‘ F‘P. . "U . succession . competition . coevolution . biomes _ environmental resistance munw> Individuals within a population are selected (for or against) based on their: A. phenotypes B. genotypes C. gene pools D. mutations E. chromosomes The Carbon cycle differs from the Nitrogen cycle in that: A. Carbon can be found in the atmosphere B . Carbon in the atmosphere is readily usable by all plants C. the atmospheric pool of Carbon is quite small D. Carbon has a long term geological component to its cycle E. more than one of the above is a difference between the cycles The current increase in the " greenhouse effect" can be reversed by: A. decreasing carbon dioxide emisions B. decresing carbon dioxide uptake C. decreasing the earth's plant biomass D. increasing the use of fossil fuels E. increasing the clearing of forested lands Which of the following statements about genetic drift is correct? . it occurs only when population sizes are very large . it does not effect allele frequencies in the next generation . it is the result of non-random mating . it always results in the dominant allele becoming more common it results in allele freqencies changing due to random events mcnw> osystems are unique among biological organizations because theyinclude: redictable changes in community structure and species compostion are referred to as: Page: 8 50. Which of the following is not a reproductive isolating mechanism between two species? . habitat differences . seasonal differences in flowerng . difference in the number of chromosomes in the monoploid condition . difference in the sequence of genes turned "on" during development none, all of the above are reproductive isolating mechanisms monw> “I don't have any hard evidence. Connie — but my intuition tells me that Ed's been cross-pollinating." Page: 9 BIOL 1201 :2me Answer Key 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 12) 13) 14) 15) 16) 17) 18) 19) 20) 21) 22) 23) 24) 25) 26) 27) 28) 29) 30) A, B, c, D, 31) 32) 33) 34) 35) 36) 37) 38) 39) 40) 41) 42) 43) 44) 45) 46) 47) 48) 49) 50) Petunia ITIIP mm>m3>>1111:9anUUmUUanwmwwmn>wn>omOmown>0wmwmun>wnn ...
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This note was uploaded on 02/14/2011 for the course BIOL 1201 taught by Professor Wishtichusen during the Spring '07 term at LSU.

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exam4+summer94 - 1. You are studying a small population...

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