Bio Exam 3

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Bio Exam 3
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2011-04-10 18:28:40
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Bio Exam 3
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  1. Which (if any) of the following is not consistent with the observations of Charles Darwin when he proposed the ideas ofNatural Selection and descent and modification?

    A A species can produce more offspring than can survive
    and reproduce

    B. Variation exists among individuals

    C. In competition for
    resources or mates the fittest
    will survival and reproduce

    D. Some alleles increase or decrease over time

    E. All of the above are consistent with the ideas he proposed
    E. All of the above are consistent with the ideas he proposed
  2. Which of the following
    explanations for the variety
    of finch species on the Galapagos islands
    is most consistent with the theory of evolution?

    A Each of the different species
    migrated from the mainland independently.

    B. Each of the different species
    migrated from the mainland together

    C. The current finch species have descended and evolved from one or a few finch species
    that migrated from the mainland
    some time ago

    D. All the current finch species have descended and evolved from dinosaurs on the islands millions of years ago
    C. The current finch species have descended and evolved from one or a few finch speciesthat migrated from the mainland
  3. The idea that evolution may not proceed at a constant rate, but that some periods saw rapid change and variations, followed by periods of relative stasis is most consistent with:

    A Punctuated equilibrium

    B. Gradualism

    C. Spontaneous generation

    D. Lamarck's ideas
    A Punctuated equilibrium
  4. Support for the mechanism of evolution is seen in the finding that small changes in regulatory genes can have a major profound effect on an organism and that similar organizer genes control the development of the same organs, like eyes or segmentation, in diverse
    organisms. Evidence such as this can be found by examining:

    A The Fossil Record

    B. The Molecular Record

    C. The Anatomical Record
    B. The Molecular Record
  5. Two similar bird species that mate at different times
    of the year and have distinctive mating calls are examples of:

    A. Prezygotic isolating mechanisms
    B. Independent assortment
    C. Postzygotic isolating mechanisms
    E. Natural selection
    A. Prezygotic isolating mechanisms
    (this multiple choice question has been scrambled)
  6. Which (if any) ofthe following are not homologous structures?

    A bat wings and porpoise flippers
    B. human arms and horse foreleg
    C. butterfly wings and bird wings
    D. All of the above are pairs ofhomologous structures
    C. butterfly wings and bird wings
  7. In population biology the "Hardy-Weinberg" equation is used to analyze allele frequencies. Which of the following assumptions are made for the "ideal polulation"?

    A. no natural selection to change allele frequency

    B. random mating

    C. equal offspring and survival

    D. all three would apply to such a population
    D. all three would apply to such a population
  8. Assume a population of a species of beetle; very small beetles are eaten by ants, very large beetles can not fit into cracks in tree bark to lay their eggs properly. This population is under:

    A. Directional selection

    B. Stabilizing selection

    C. Disruptive selection
    B. Stabilizing selection
  9. Assume that a person travels to a tropical
    country and unknowingly brings several purple leaf­ bugs back in the bottom of their suitcase. These bugs take up residence on the houseplants in the person's apartment and soon the apartment is infested with purple leaf-bugs. In terms of population biology this would best be described as an example
    of:

    A. Mutation

    B. Genetic drift

    C. The Founder effect

    D. Natural Selection

    E. Selective Mating
    C. The Founder effect
  10. If a population practices positive assortive mating, or inbreeding what phenotypes might we expect to see?

    A. heterozygotes will predominate and no recessive
    traits will be seen

    B. homozygotes will predominate and recessive traits
    will appear more often
    B. homozygotes will predominate and recessive traitswill appear more often
  11. Which xplanation for the high frequency of the allele for sickle cell anemia in Sub-Saharan Africa is most consistent with current theories
    in population biology?

    A. the abundance of Uranium mines causes an increase in mutation

    B. in the heterozygous condition
    individuals are protected
    from malaria

    C. the abundance of trees increases the 02 concentration

    D. Genetic Drift
    B. in the heterozygous conditionindividuals are protectedfrom malaria
  12. To create the 5 kingdom system
    living creatures are separated according
    to their cellular
    structure and how they acquire
    energy (food). To create the three domain "rRNA
    tree of life" the sequences of a common gene (rRNA) are compared and similar sequences are assumed to imply closer relationships. How do the three domain
    rRNA tree and 5 kingdoms compare?

    A. No difference

    B. Plants, animals and fungi are small branch tips on the rRNA Tree of Life

    C. In the 5 kingdom system all eukaryotes are in one kingdom

    D. In the 5 kingdom system the protists
    are scattered into several kingdoms
    B. Plants, animals and fungi are small branch tips on the rRNA Tree of Life
  13. If two animals are in the same Class they must also be in the same:

    A. Genus
    B. Family
    C. Phylum
    D. Order
    E. more than one of the above
    C. Phylum
    (this multiple choice question has been scrambled)
  14. How do prokaryotes differ from eukaryotes?

    A. Prokaryotes are single celled
    and all eukaryotes are multicellular

    B. Prokaryotes lack DNA C. Prokaryotes lack RNA

    D. A Prokaryote lacks a nucleus
    D. A Prokaryote lacks a nucleus
  15. How do Bacteria,
    Archaea and Eukaryotes compare?

    A. In all respects Bacteria and Archaea
    are similar and differ from Eukaryotes

    B. In all respects Bacteria and Eukaryotes are similar and differ from Archaea

    C. In all respects Eukaryotes and Archaea are similar and differ from Bacteria

    D. Bacteria and Archaea both lack a nucleus, but in some ways Archaea are like Eukaryotes
    D. Bacteria and Archaea both lack a nucleus, but in some ways Archaea are like Eukaryotes
  16. Which group of bacteria is associated with the production of oxygen in early earth history?

    A. Enterobacteria like E.coli
    B. Spirochetes
    C. Cyanobactria
    D. Nitrogen fixers
    C. Cyanobactria
    (this multiple choice question has been scrambled)
  17. Which of the following (if any) is not one of the four postulates Koch developed to establish a causative link between a specific microbe
    and a disease?

    A. Organism must be present
    in individuals suffering from the disease
    and absent in healthy individuals.

    B. Organism must be isolated,
    grown in pure culture away from the host.

    C. Injection of organisms from the pure culture into a healthy
    animal should cause the disease
    symptoms to appear.

    D. The organism
    must then be isolated from the diseased
    animal, cultured again,
    and shown to be identical
    in size, shape,
    and color to the original
    organism.

    E. All of the above are valid postulates
    E. All of the above are valid postulates
  18. Which of the following statements is not accurate concerning Virus?

    A. Viruses are composed of nucleic acid and protein
    and are not cells or live organisms.

    B. Viruses have a genome,
    but must use the ATP and carbon compounds
    of their host to copy and translate their genome.

    C. Most organisms are parasitized by at least one kind of virus.

    D. Viruses are extremely small when compared
    to a eukaryotic cell

    E. All the above statements
    are true
    E. All the above statements are true
  19. True or False: On earth, Nitrogen fixation
    from molecular N2 to a form that can be used by other living organisms is performed
    by Bacteria.

    A. True B. False
    A. True
  20. Which (if any) of the following statements is not valid concerning
    Bacteria?

    A. Bacteria occupy almost every
    place on earth

    B. Bacteria are the most numerous organisms
    on the planet

    C. Bacteria can obtain energy from light,
    organic and inorganic compounds

    D. All bacteria cause disease and are harmful to humans

    E. All of the above are valid
    D. All bacteria cause disease and are harmful to humans
  21. Viral genomes may be in all of the following
    forms except:

    A. double strand DNA

    B. single strand RNA

    C. RNA genome that is reverse transcribed into DNA by the host cell

    D. All of the above are possible viral genomes
    D. All of the above are possible viral genomes
  22. What term best describes the protists?

    A. all small creatures

    B. eukaryotes that are not animals, plants or fungi

    C. the group that includes bacteria and harmful eukaryotes

    D. all unicellular eukaryotes
    B. eukaryotes that are not animals, plants or fungi
  23. Which (if any) of the following is not a member of the protists?

    A. dinoflagellates and diatoms

    B. organisms responsible for malaria or toxoplasmisis

    C. ciliates, like paramecium

    D. Slime molds and brown algae or Kelp

    E. all of the above are protists
    E. all of the above are protists
  24. True or False: Fungi are classed as plants because they are nonmotile and have chloroplasts.

    A. True
    B. False
    B. False
  25. Which (if any) of the following is not a fungus?

    A. Yeast
    B. Punicillium
    C. bread mold
    D. all are fungi
    E. Mushrooms
    D. all are fungi
    (this multiple choice question has been scrambled)
  26. True or False:
    According to the Endosymbiosis Theory, mitochondria originated when a bacterial cell took up residence inside a eukaryotic cell more than a billion years ago.

    A. True
    B. False
    A. True
  27. How do ferns differ from Gymnosperms and Angiosperms

    A. ferns lack chlorophyll

    B. ferns lack vascular tissue for water and nutrient transport

    C. Ferns lack seeds

    D. all ofthe above

    E. none of the above
    C. Ferns lack seeds
  28. True or False: In angiosperms, flowers
    aide in pollination and fruit aids in dispersal of the seeds.

    A. True
    B. False
    A. True
  29. True or False:
    In angiosperms, flowers the stigma and style are the male parts that produce pollen and the anther and stamen are the female parts that receive
    pollen.

    A. True
    B. False
    B. False
  30. True or False: In monocots the seed has a single cotyledon, the leaves have parallel veins and the flower parts come in threes.

    A. True
    B. False
    A. True
  31. True or False: Pine trees are examples of gymnosperms, their seeds are not fully enclosed.

    A. True
    B. False
    A. True
  32. True or False:
    An angiosperm plant seed contains: a plant embryo, a source of food and a protective cover.

    A. True
    B. False
    A. True
  33. True or False: Some fungi may undergo mitosis as either haplids or diploids.

    A. True
    B. False
    A. True

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