1) study the figure at right. what does the letter a depict?
a. energy of the reactant
b. energy of the products
c. energy of activation
d. substrate concentration
2)
substrates that reoccur in several metabolic pathways form the metabolic pool. study the
figure to match the substrates with the corresponding pathway.
a. a is glycerol; b is amino acids; c is glucose; d is fatty acids
b. a is glucose; b is fatty acids; c is glycerol; d is amino acids
c. a is amino acids; b is fatty acids; c is glucose; d is glycerol
d. a is amino acids; b is glucose; c is glycerol; d is fatty acids
3) photorespiration occurs mainly in:
a. c3 plants.
b. c4 plants.
c. cam plants.
d. all of the above.
4) the function of a vector in genetic engineering is to
a. cut dna into many fragments.
b. introduce rdna into a host cell.
c. link together newly joined fragments of dna.
d. make millions of copies of a specific segment of dna.
e. separate fragments of dna by their length and electrical charges.
5) the stone tools and the dentition of homo habilis indicate that early humans were
a. strictly herbivores.
b. strictly carnivores.
c. strictly scavengers.
d. omnivores that could either scavenge or hunt for meat.
6) which of the following statements about the peripheral nervous system is not correct?
a. the nerves contain the cell bodies of the neurons.
b. the nerves contain nerve fibers which are bundles of axons.
c. the somatic nervous system sends motor impulses to the skeletal muscles.
d. effectors include the muscles that carry out the instructions sent from the central
nervous system.
e. cranial and spinal nerves are part of the peripheral nervous system.
7) what occurs when two species with very similar niches live in an overlapping range?
a. speciation
b. hypervolume
c. competitive exclusion
d. total extinction of one species
e. a switch in habitat for one of the organisms
8) arrange in order, the levels of ecological study from most inclusive to most
exclusive:
a. biosphere, ecosystem, community, population, individual organism
b. ecosystem, biosphere, population, community, individual organism
c. individual organism, community, population, ecosystem, biosphere
d. individual organism, population, community, ecosystem, biosphere
9) as a solid, water floats. this means that
a. solid water is less dense than liquid water.
b. organisms in ponds, lakes, and reservoirs can survive under the ice cover.
c. this is due to hydrogen bonding changes.
d. all of the choices are correct.
10) all of the following are characteristics of primates except the
a. five long dexterous digits on hands and feet.
b. three-dimensional binocular vision.
c. well-developed brain.
d. opposable thumb.
e. rapid postnatal maturation.
incorrect
11) which of the following is a function of the skin?
a. protecting underlying body parts from physical trauma
b. preventing water loss
c. thermoregulation
d. monitor touch, pressure, temperature, and pain
e. all of the above are a function of the skin.
12) characterize the reactions involved in these reactions of the calvin cycle.
a. these are reactions involved in the regeneration of rubp. the reactions include an
exergonic reaction (atp adp) and the reduction of the coenzyme nadph.
b. these reactions are involved in the reduction of co2. energy is required in the form of
atp, which is hydrolyzed to adp. the substrate bpg is reduced, while the coenzyme
nadph is oxidized.
c. these reactions are involved in the fixation of co2. energy is required in the form of
adp, which is hydrolyzed to atp. the substrate bpg is oxidized, while the coenzyme
nadph is reduced.
d. these reactions are part of light reactions in noncyclic pathway. atp and nadph are
used during these reactions.
13) our domesticated honey beeoriginally from europeis slow to sting, requires
abundant flower nectar, gets up late in the morning, and stores much honey but only
produces enough new brood to swarm once a year. because the european honey bee was
performing poorly as a honey producer in south america, the african subspecies was
imported in a breeding experiment. the african honey bee formed small nests, foraged
earlier and on smaller nectar sources, produced less honey stores and more brood,
swarmed four or five times a year, and was fast to sting. however, when the african
queens escaped, the two populations interbred and the african genotype spread several
hundred miles north each year. surprisingly, a hundred miles behind the expanding
range of the african honey bees, the european and hybrid strains died out and the bees
were essentially 100 percent african. how would this be explained in evolutionary
genetics terms?
a. gene flow is not occurring and therefore these are two separate species.
b. this is a natural consequence of the hardy-weinberg equilibrium.
c. obviously the african bee genes are dominant over the european honey bee alleles.
d. gene flow is occurring between these subspecies but the african bee is ecologically
better suited”.
e. this can be understood as a classic case of genetic drift.