1) an organism does not necessarily have to ensure that its own genes are passed to the
next generation. the adaptation to the environment due to the reproductive success of an
organism’s relatives is
a. altruism.
b. kin selection.
c. natural selection.
d. direct selection.
2) which statement is correct about how carbon dioxide is carried in the bloodstream?
a. carbon dioxide enters the bloodstream from the tissues. it then combines with
hemoglobin to form carbaminohemoglobin but most of it is carried in the form of
bicarbonate.
b. carbon dioxide enters the bloodstream from the atmosphere. it then combines with
hemoglobin to form carbaminohemoglobin but most of it is carried in the form of
bicarbonate.
c. carbon dioxide enters the bloodstream from the tissues. it then combines with
hydrogen ions to form bicarbonate ion but most of it is carried in the form of
carbaminohemoglobin.
d. carbon dioxide enters the bloodstream from the tissues. it then combines with
hemoglobin to form bicarbonate ion but most of it is carried in the form of
carbaminohemoglobin in the bloodstream.
e. carbon dioxide enters the bloodstream from the atmosphere. it then combines with
water to form carbonic acid but most of it is carried in the form of bicarbonate.
3) the most important contribution of the citric acid cycle to cellular respiration is:
a. production of large quantities of atp
b. creation of proton gradients
c. reduction of glucose and corresponding oxidation of carbon dioxide
d. oxidation of metabolite molecules and the corresponding reduction of coenzymes
e. release of co2
4) when comparing archaea with bacteria
a. both archaea and bacteria are easily cultured and studied in the laboratory.
b. the chemical nature of the cell wall of archaea and bacteria is identical and shows
their early relationship.
c. bacteria are not very diverse and are limited in distribution, while archaea are far
more diverse and found everywhere.
d. the archaea and bacteria are cases of reduction in traits and are both derived from
early eukarya.
e. none of the choices are true.
5) mutagens and carcinogens are associated with
a. induced mutations.
b. spontaneous mutations.
c. transposon activity.
d. dna replication errors.
6) the scientific name of the family dog is canis familiaris. canis represents the species
_______.
a. genus name.
b. species name.
c. phylum name.
d. kingdom.
7) it is proposed that cro-magnons were responsible for the extinction of many large
mammals during the pleistocene epoch. how could this feat have been accomplished?
a. cro-magnon man had an increase in tool technology that enabled them to kill animals
from a distance.
b. cro-magnon man was the first species of hominid to use fire. this would have
increased their success during hunting.
c. cro-magnon man was the most efficient bipedal species. they would have been able to
run after prey species more efficiently than any of their predecessors.
d. cro-magnon man was the first species of hominids to hunt in groups. this would have
increased their chance of killing larger animals.
8) what is the correct sequence of events that has led to the decimation of the kelp beds
along the west coast of the u.s.?
a. sea otters decline in numbers
b. increase in orca predation on sea otters
c. decline in the seals and sea otters
d. over fishing of the herring and perch
e. increase in the sea urchin population
a. d – c – b – a – e
b. d – c – b – e – a
c. a – d – c – b – e
d. d – b – c – a – e
e. b – d – c – a – e
9) which of the following plant hormones stimulates the ripening of fruit and inhibits
plant growth?
a. abscisic acid
b. auxin
c. cytokinin
d. ethylene
e. gibberellin
10) which is not part of a description of an antibody molecule?
a. contains two light chains and two heavy chains
b. contains an antigen-binding site on each arm
c. contains a constant and a variable region on each chain
d. forms an x-shaped protein molecule
incorrect
11) if one strand of dna has the base sequence aagcaa, the complementary strand has
which of the following sequences?
a. uucguu
b. ttcgtt
c. aagcaa
d. utcgtu
e. ttcgtg
12) sieve tube members are connected by
a. plasmodesmata.
b. tight junctions.
c. companion cells.
d. tracheids.
13) what is the correct order of the linnaean system of classification, starting with the
most general category?
a. domain, kingdom, phylum, class
b. domain, phylum, class, kingdom
c. kingdom, class, phylum, species
d. genus, order, class, phylum,
14) what is the mode of action of hormones?
a. peptide hormones bind to cell-surface receptors and result in the activation of
enzymes.
b. steroid hormones enter the cell, usually bind to receptors in the nucleus and result in
the activation of certain genes.
c. hormones are actually precursors or raw materials that are naturally converted to end
products by the correct target cell.
d. hormones are chunks of dna that are sent out to be incorporated into target cells and
become activated to produce hormone products.
e. peptide hormones bind to cell-surface receptors and result in the activation of
enzymes, while steroid hormones enter the cell, usually bind to receptors in the nucleus
and result in the activation of certain genes.
15) which of these is not a major photosynthetic pigment in plants?
a. chlorophyll a
b. chlorophyll b
c. chlorophyll c
d. carotenoid pigments
16) which group of primates has the closest evolutionary relatedness to the lemurs?
a. tarsiers
b. gibbons
c. gorillas
d. old world monkeys
e. chimpanzees
17) according to the sliding filament theory of muscle contraction,
a. actin binds atp and breaks it apart as actin pulls against myosin.
b. calcium ions are released from myosin as the filaments slide by.
c. the thick and thin filaments do not change length during this process.
d. an accordion-like pleat is formed as the myosin and actin interact.
e. all of the choices are correct.
18) bacterial cells pick up free pieces of dna that were secreted by live bacteria or
released from dead bacteria in their environment. this process is called
a. transformation.
b. transduction.
c. conjugation.
d. infection.
e. replication.
19) which of the following features is not part of the ecological niche of a white tailed
deer?
a. the number of acorns it consumes during the fall.
b. the availability of woods for it to use as cover in order to escape from predators.
c. the presence of a water source within its habitat.
d. all of these are part of a white tailed deer’s ecological niche.
20) which enzyme enables a retrovirus to convert its’ rna genome into dna?
a. dna helicase
b. reverse transcriptase
c. dna ligase
d. reverse helicase