1) among the many functions of wetlands is (are)
a. providing food and habitats for fish, waterfowl, and wildlife.
b. purifying water by filtering it and breaking down toxic wastes and nutrients.
c. absorbing storm and overflow waters.
d. all of the choices are functions performed by wetlands.
2) there is a species of desert lizard where only females are known to exist-there are no
males known. it is nevertheless necessary for two females to court and for one to
assume the posture of a male to stimulate the female to produce eggs. no fertilization
can occur, and the eggs develop into female lizards. what is the probable evolutionary
mechanism for this occurring?
a. the species is probably going extinct.
b. the desert is relatively uniform and there is little advantage to maintaining variation,
but the animal has not been able to completely evolve away from its heritage of sexual
reproduction.
c. this switch in mating behavior is the direct physical reflection of crossing-over.
d. this is probably an asexual organism attempting to mimic sexual reproduction.
3) which level of primary control in eukaryotic gene activity involves changes in the
polypeptide chain before it becomes functional?
a. feedback control
b. translational control
c. transcriptional control
d. posttranscriptional control
e. posttranslational control
4) all of the following statements concerning birds are true except
a. birds have small, relatively under-developed brains.
b. some birds do not have the ability to fly.
c. birds have acute vision.
d. birds use the sun, stars, and the earth’s magnetic field to guide them.
5) a type ii survivorship curve, drawn by plotting the number of individuals in a given
population alive at the beginning of each age interval, is characterized by
a. most individuals dying of old age.
b. many individuals dying early in life.
c. individuals dying at a constant rate throughout time.
d. most individuals dying during their reproductive years.
6) which of the following reproductive technologies would produce the greatest
complications in defining the individuals who are considered the parents of the child?
a. intracytoplasmic sperm injection
b. in vitro fertilization
c. gamete intrafallopian transfer
d. artificial insemination by donor
e. using a surrogate mother
7) which of the following major divisions of geologic time is mismatched with the
organisms that flourished during that time period?
a. carboniferous periodage of amphibians
b. mesozoic eraage of reptiles
c. cambrian periodage of fish
d. cenozoic eraage of homo sapiens
8) the layers of cells that protect the root apical meristem are the
a. cortex.
b. endodermis.
c. bark.
d. root cap.
e. periderm.
9) a population must have ______ for natural selection to occur.
a. a stable environment
b. abundant resources
c. many individuals
d. inheritable variation
10) which of the following hormones stimulate osteoblasts to form bone?
a. erythropoietin
b. parathyroid hormone
c. growth hormone
d. sex hormones
e. both growth and sex hormones
11) eukaryotic cells are substantially larger than bacterial cells and average over 20
times more volume-per-surface-area than bacterial cells. how can the eukaryotic cell
membrane provide this higher rate of exchange of materials?
a. plasma membrane folds increase the surface area.
b. carrier proteins speed the rate at which a solute crosses the plasma membrane in the
direction of decreasing concentration.
c. mitochondria are concentrated near membranes to provide energy for active transport
of molecules or ions.
d. large molecules are engulfed by vesicle formation.
e. all of the choices are correct.
12) the probable transitional link between the hominoids and the monkeys is
a. australopithecus afarensis.
b. australopithecus africanus.
c. proconsul.
d. homo habilis.
e. homo erectus.
13) if an animal needed to store energy for long-term use, but not be encumbered with
the weight of extra tissue, which is the best molecule for storage?
a. fructose and glucose in the form of honey
b. high-calorie fat molecules
c. complex cellulose molecules
d. starch
e. glycogen with extensive side branches of glucose