1) a functional advantage of having human testes in the scrotum rather than in the
abdomen is
a. lack of room in the abdomen.
b. a shorter sperm duct.
c. more direct blood supply.
d. lower temperature.
e. greater protection to the testes.
2) the exchange of gases between the lungs and the blood occurs by
a. diffusion.
b. osmosis.
c. filtration.
d. active transport.
e. ionic bonding.
3) an insect population lives along the edge of a north-south mountain range. the
populations from the east and west slope eventually join in a low northern pass and
interbreed, producing fertile offspring, but they do not circle around the southern edge
because of a desert barrier. when glaciers move southward, the populations are pushed
south of the northern pass and are isolated. while isolated, the two populations develop
enough differences over time that when the glaciers retreat north and the insects again
share the same pass, they no longer mate at the same time, nor can they produce fertile
offspring. these insects
a. began as one species and therefore remain one species.
b. were originally two species and remain two species.
c. were originally two species but are now one species.
d. were originally one species but are now two species.
e. the number of species cannot be determined from the information given.
4) which group of archaea are chemoautotrophic anaerobes that will use hydrogen as an
electron donor?
a. halophiles
b. methanogens
c. thermoacidophiles
d. cyanobacteria
5) which of these statements is not true about dna?
a. it is the genetic material of the cell.
b. it forms a double helix.
c. adenine pairs with thymine and guanine pairs with cytosine.
d. it contains the sugar ribose.
e. the sugar and phosphate groups form the backbone of the molecule.
incorrect
6) a researcher reports he has conducted many experiments where a galvanometer (lie
detector) was hooked up to detect a plant’s responses. he reports that when a spider was
released near the plant, the spider’s decision to escape was picked up by the plant,
“causing a reaction in the leaf.” when other researchers repeated the experiment, they
could not get any galvanometer responses. the researcher then concluded that plants
could be put into a faint by humans.
a. this is a justified conclusion from a research design that appears to follow the
scientific method.
b. the only problem with this general research plan is that it lacks a control.
c. results must be somewhat repeatable and these results that only work for this
researcher do not qualify as science.
d. the design is scientific; it just lacks a hypothesis.
e. if the researcher has actual numerical counts, this must be accepted as valid science.
7) based on molecular data and skull features, what reptile(s) has an independent
lineage from all other reptiles?
a. lizards
b. snakes
c. turtles
d. crocodiles
e. lizards and crocodiles have independent lineages
8) the distribution of species can help provide information about all of the following
except _________.
a. past geological events.
b. the movement of continents.
c. formation of volcanic islands.
d. ecological change.
e. the time period in which a species was present on earth.
incorrect
9) during the light reactions what structure is responsible for absorbing the solar
energy?
a. chloroplast
b. stroma
c. stoma
d. bark of the tree
10) normally, concentrations of metabolically important substances, such as glucose,
are
a. high in glomerular filtrate but only a trace in urine.
b. low in glomerular filtrate but high in urine.
c. high in glomerular filtrate and urine.
d. low in both glomerular filtrate and urine.
e. excluded from entering the excretory system altogether.