1) to determine the age of fairly recent fossils and organic artifacts, it is possible to
analyze the amounts of the isotopes 14c and 14n, because over time the 14c-which
originated in the atmosphere-breaks down into 14n. what net change occurred for this to
happen?
a. the 14c lost an electron.
b. the 14c gained an electron.
c. the 14c lost a proton.
d. the 14c gained a proton.
e. the 14c gained a neutron.
2) the pacemaker of the cardiac conduction system is the
a. atrioventricular node.
b. sinoatrial node.
c. medulla oblongata.
d. purkinje fibers.
3) protein digestion occurs in the
a. mouth, stomach, and small intestine.
b. stomach and small intestine.
c. stomach, esophagus, and small intestine.
d. mouth and large intestine.
e. small intestine, large intestine, and mouth.
incorrect
4) which of the following organisms belong to the supergroup excavates?
a. euglenoids, amoeboids & cellular slime molds
b. diplomonads, euglenoids & parabasalids
c. diplomonads, euglenoids & diatoms
d. foraminiferans, radiolarians & fungi
5) semen is composed of secretions or cells produced in all of the following structures
except
a. the prostate gland.
b. vas deferens.
c. bulbourethral glands.
d. seminal vesicles.
e. the testes.
6) monotremes
a. are egg laying mammals.
b. include the anteater and duck-billed platypus.
c. nurse their young.
d. all of the above are true.
7) which of the following biomes is characterized by rich soils, insufficient rainfall for
trees, and many herbivores?
a. grasslands
b. chaparral
c. desert
d. taiga
e. tundra
8) as food is swallowed it may come into contact with air in which of the following
respiratory organs?
a. bronchi
b. trachea
c. larynx
d. pharynx
e. nasal cavity
9) which structures located on the oocyte serve to bring the entire sperm into it?
a. microvilli
b. flagella
c. zona pellucida
d. corona radiata
10) whether a molecule can cross the plasma membrane depends upon
a. the size of the molecule.
b. the shape of the molecule.
c. the chemical properties of the molecule.
d. the charge of the molecule.
e. all of the choices are correct.
11) all of the following statements about cnvs are true except
a. cnvs occur when genes have changed their number.
b. the changes may result from fork stalling and template switching.
c. cnvs have known links to disease.
d. all of the above are true.
12) which of the following biome will receive migratory animals such as caribou,from
the tundra?
a. coniferous forest
b. temperate deciduous forest
c. polar ice
d. grasslands
e. tropical rainforest
13) what specific part of the antibody determines the class of the antibody?
a. variable region of the light chain and heavy chain
b. antigen binding sites
c. constant region
d. all of the above are correct.
e. none of the above are correct.
14) the cell responsible for producing a rapid antibody response against a foreign
protein when it is encountered years after the first encounter is a
a. memory b cell.
b. memory t cell.
c. killer t cell.
d. plasma cell.
15) what is the correct summary for the energy investment vs. energy harvesting steps
of glycolysis?
a. 2 atp are invested and 4 atp are harvested to produce a net gain of 2 atp
b. 4 atp are invested and 6 atp are harvested to produce a net gain of 2 atp
c. no atp are invested and 2 atp are harvested to produce a net gain of 2 atp
d. 2 atp are invested and no atp are harvested to produce a net loss of 2 atp
16) two fossilized remains are found and scientists assume the two organisms are
different but related. which of the following would determine the relatedness of these
two organisms?
a. homologous structures
b. vestigial structures
c. biogeography
d. all of the choices could be examined to determine relatedness.
17) why are plants green?
a. they absorb only green wavelengths of light.
b. they absorb only yellow and blue wavelengths of light.
c. they reflect nearly all wavelengths of light.
d. they reflect green wavelengths of light and absorb blue and red light.
e. they reflect yellow and blue wavelengths of light.
18) if calcium is not present in the muscle cell what complications can occur in regards
to muscle contraction?
a. tropomyosin will not be pulled away from the myosin binding sites.
b. myosin heads will not bind to the actin filament.
c. the power stroke will not be produced preventing the actin filament from moving.
d. all of these are complications resulting from a lack of calcium.