Unlock document.
This document is partially blurred.
Unlock all pages and 1 million more documents.
Get Access
1) which of the following lists correctly traces the path of a sound vibration as it moves
through the ear?
a. auditory canal-tympanic membrane-malleus-incus-stapes-oval
window-cochlea-cochlear nerve
b. auditory canal-malleus-incus-stapes-tympanic membrane-oval
window-cochlea-cochlear nerve
c. auditory canal-tympanic membrane-malleus-incus-stapes-cochlea-oval
window-cochlear nerve
d. auditory canal-tympanic membrane-oval
window-cochlea-malleus-incus-stapes-cochlear nerve
e. auditory canal-malleus-incus-stapes-oval window-tympanic
membrane-cochlea-cochlear nerve
2) the dna of a _______ is wrapped around histone molecules to form a "beaded string."
a. prokaryote
b. eukaryote
c. bacterium
d. all of the above.
3) which of the following is not an endocrine gland?
a. pituitary
b. hypothalamus
c. thymus
d. testes
e. all are endocrine glands.
4) after the dna repair enzymes complex has completed its function, approximately how
many base-pairs are still improperly matched?
a. 1 in 10,000
b. 1 in 100,000
c. 1 in 1,000,000
d. 1 in 100,000,000
e. 1 in a billion
5) in the pressure-flow model of phloem transport, the sink is normally
a. the stem.
b. the roots.
c. xylem.
d. lenticels.
6) if black fur is produced by a recessive allele, which genotype is most likely to
produce a black individual?
a. bb
b. bb
c. bb
d. cb
7) the endosymbiont hypothesis proposes all of the following except
a. mitochondria and chloroplasts were once free-living bacteria.
b. a nucleated cell engulfed an aerobic bacterium which evolved into mitochondria.
c. prokaryotes evolved when an aerobic bacterium engulfed a cyanobacterium.
d. chloroplasts originated when a nucleated cell engulfed a cyanobacterium.
8) all of the following animals are likely to undergo parthenogenesis except
a. humans.
b. flatworms.
c. fish.
d. lizards.
e. insects.
9) which of the following is not part of the reproduction cycle of hiv?
a. reverse transcription of the viral rna
b. reverse transcription of the viral dna
c. maturation of the viruses
d. biosynthesis of the viral mrna
10) plants could readily develop seasonal responses for floweringbased on temperature
changes but have "elected" through evolution to manage their rhythms based on a
comparison of daylight and darkness. why has the day-night ratio system been selected?
a. temperature has no effect upon plant biochemistry.
b. temperature is a gradation but day/night is all-or-nothing.
c. a plant's nervous system is tuned to light stimuli and not to temperature stimuli.
d. temperatures fluctuate widely across seasons and from year to year, but photoperiod
comparisons are a more reliable indicator of season.
11) which of the following statements about the calvin cycle is correct?
a. the co2 is absorbed and reduced to ch2o
b. the co2 is absorbed and reduced to c2h2o2
c. the co- is absorbed and reduced to ch2o
d. the co2 is absorbed and used to form atp
12) all of the following statements about population distribution are true except
a. population distribution is the pattern of dispersal of individuals across an area of
interest.
b. environmental conditions, such as climate and altitude, are often limiting factors of
distribution.
c. a population's distribution is calculated as the number of individuals per unit area.
d. behavioral traits, such as territoriality, can affect the distribution pattern of a
population.
13) the biological species concept is limited, and may not be applied to
a. asexually reproducing organisms.
b. organisms known only in the fossil record.
c. species that could possibly interbreed if they lived near one another.
d. all of the above.
14) all of the following are characteristics of vertebrates except
a. internal organs.
b. vertebral columns.
c. postanal tails.
d. exoskeletons.
e. skulls.
15) what is the main sex hormone of the human male?
a. testosterone
b. estrogen
c. luteinizing hormone (lh)
d. follicle-stimulating hormone (fsh)
e. interstitial cell-stimulating hormone (icsh)
16) which of the following statements about ecological pyramids is true?
a. pyramids built upon the biomass of organisms at each level eliminate size as a factor.
b. energy gains between trophic levels occur based upon biomass conversion.
c. the limited number of trophic levels in an ecological pyramid is due to increasing
complexity and size of organisms at each greater trophic level.
d. a pyramid of organism numbers will always have a large base and a small top.
e. none of the choices are true.
17) the part of a body of water where light does not penetrate is the
a. littoral zone.
b. benthic division.
c. pelagic division.
d. profundal zone.
e. limnetic zone.
18) which of the following groups had made their appearance during the ordovician
period?
a. jawless and jawed fish.
b. jawed fish and amphibians.
c. amphibians and reptiles.
d. reptiles and mammals.
e. all of these groups had appeared by the ordovician period.
19) ________ communication occurs within an animal societal unit.
a. chemical
b. auditory
c. visual
d. tactile
e. all of the choices are correct.
