1) conservation biology is a field that relies on multiple other disciplines to support it.
2) gene cloning can be accomplished by recombinant dna technology and polymerase
chain reactions.
3) the hardy-weinberg equilibrium is usually met in populations in changing
environments.
4) the relationship between plants and their pollinators is a good example of parasitism.
5) fluidity of a membrane increases as the percentage of unsaturated fatty acids in the
phospholipids goes up.
6) the genes of a single operon are all regulated by the same repressor, operator, and
promoter.
7) both living and nonliving entities exhibit homeostatic controls
8) the light-dependent reactions of photosynthesis occur in the stroma of the
chloroplast.
9) the lack of oxygen in the ancient earth’s atmosphere was beneficial because oxygen
combines with organic molecules to prevent them from forming polymers.
10) several lineages of reptiles evolved from a common ancestral stem reptile, each
adapting to different ways of life.
11) a gram-negative bacteria will have a peptidoglycan layer that is sandwiched
between two plasma membranes and will stain purple.
12) a lattice holds the members of a bivalent together in such a way that the rna of the
non-sister chromatids is aligned.
13) fossil fuels are full of energy stored from photosynthesis millions of years ago.
14) _____ provides the energy for muscle contraction.
a. atp
b. adp
c. creatine phosphate
d. lactate
e. glycogen
15) the situation with major oceanic fishing areas is
a. good, since the oceans are so large, they are the one remaining natural ecosystem that
is not susceptible to extinction.
b. generally positive, with only one or two of the 15 major oceanic fishing areas
over-exploited.
c. generally negative, with 11 of the 15 major oceanic fishing areas overexploited.
d. positive for the bottom dwellers that are protected but negative for the schools of
swimming fish.
e. negative for the bottom dwellers that are over-fished by trawling but positive for the
schools of swimming fish that can easily get away.
16) animals that are revered by humans due to their appearance or emotional ties are
a. flagship species.
b. keystone species.
c. endangered species.
d. threatened species.
17) africa, asia, south america, and antarctica share some patterns of primitive (fossil)
plants and early reptiles, but do not have similar mammal populations. these findings
a. cast serious doubts upon the theory of continental drift and fused land masses.
b. are an unsolved puzzle probably due to the random nature of biological evolution.
c. suggest that a pattern of land bridges existed at different times in geological history.
d. suggest that the earlier plants and reptiles evolved while continents were joined, but
mammals radiated into diverse groups after separation.
e. suggest that the mammals evolved earlier while continents were joined, but plants
and reptiles radiated into diverse groups after separation.
18) photoperiodism requires
a. a biological clock which can measure time.
b. a photoreceptor called phytochrome.
c. increased turgor pressure.
d. protease inhibitors.
e. a biological clock which can measure time and a photoreceptor called phytochrome
only are correct.
19) what enzyme is used to make cdna from mrna?
a. dna ligase
b. helicase
c. reverse transcriptase
d. rna polymerase
e. restriction enzyme
20) what are the correct steps of muscle contraction starting with ach?
a. ach diffuses across the synaptic cleft
b. the sarcolemma generates an impulse that moves down the t tubules into the
sarcoplasmic reticulum
c. ach binds to receptors in the sarcolemma
d. the sarcomere contraction produces a myofibril contraction
e. calcium is released causing the sarcomere contraction
a. a – c – b – e – d
b. a – b – c -e – d
c. d – a – b – e – c
d. c – e – d – a – b
21) one turn of the citric acid cycle produces
a. 2 nadh, fadh2, 2 atp.
b. 3 nadh, 1 fadh2, 1 atp.
c. 1 nadh, 3 fadh2, 2 atp.
d. 3 nadh, 2 fadh2, 1 atp.
e. 3 nadh, 1 fadh2, 2 atp.
22) most researchers believed that modern humans evolved from
a. australopithecus afarensis.
b. australopithecus africanus.
c. proconsul.
d. homo ergaster.
e. homo erectus.
23) when discussing population features a cohort is described as
a. all the individuals in a population born at the same time.
b. all individuals living in the same habitat.
c. all the different species in a community.
d. all the organisms interacting in the ecosystem.
e. all of the choices are correct.
24) which of the following is not a difference between anaphase i and anaphase ii?
a. at the end of anaphase i, each chromosome is composed of two chromatids and at the
end of anaphase ii, sister chromatids have separated, becoming daughter chromosomes
b. anaphase i occurs in a haploid cell while anaphase ii occurs in a diploid cell.
c. sister chromatids separate during anaphase ii while homologous chromosomes
separate during anaphase i.
d. the cell undergoing anaphase ii is genetically different from what it contained while
undergoing anaphase i.
25) which is not true of human salivary glands?
a. they produce an enzyme to begin the digestion of starch.
b. they can become inflamed and cause tonsillitis.
c. there are three pairs that open by ducts into the mouth.
d. the production of saliva aids in the mechanical digestion process.
26) the diploid (2n) number of chromosomes for a human being is
a. 23.
b. 24.
c. 44.
d. 46.
e. 48.