1) what is the scalanaturae?
a. a species of horse
b. the first theory of evolution
c. a sequential ladder of life, with humans at the top
d. another name for the theory of special creation
2) in his theory of natural selection, darwin incorporated the premise that available
resources were not sufficient for all members of a population to survive. darwin adopted
these ideas of competition and survival from
a. erasmus darwin.
b. malthus.
c. cuvier.
d. lamarck.
e. plato.
3) when a diploid plant produces diploid gametes due to nondisjunction during meiosis,
what occurs?
a. autoploidy is occurring.
b. an increase in the number of chromosomes above the parent species occurs.
c. a triploid or tetraploid plant may occur.
d. all of the above are true.
4) sea stars and sea urchins operate their tube feet by
a. a water vascular system that regulates water pressure.
b. cilia transporting hemolymph from chamber to chamber.
c. sticky threads leading from the mouth and primitive brain.
d. actin and myosin fibers that slide and give muscle actions to the five arms or “rays.”
5) to what does the term stroma refer?
a. the double membrane of the chloroplast
b. a flattened disk or sac in the chloroplast
c. a stack of thylakoid membrane structures
d. the central fluid-filled space of the chloroplast
e. the cytochrome system in the membranes of the thylakoids
6) arthropods
a. have camera-type eyes.
b. have eyespots that sense the direction and intensity of light.
c. make use of a wider range of the electromagnetic spectrum than humans.
d. have compound eyes composed of independent units called ommatidia.
e. all of the above are true.
7) the urinary bladder is useful because it
a. helps with defecation.
b. is a place where white cells attack bacteria.
c. stores urine to prevent constant urination.
d. transports urine to the outside of the body.
e. filters wastes and recycles nutrients back into the bloodstream.
8) norway rats (rattus norvegicus) and roof rats (rattus rattus) are different species.
occasionally, mating occurs if the two species are kept together in captivity. the
resulting pregnancies are not successful and the embryos die. this is an example of
a. mechanical isolation.
b. hybrid sterility.
c. zygote mortality.
d. lack of f2 fitness.
9) which of the following factor(s) limit(s) exponential growth of a population?
a. limited resource availability
b. increases in predator populations
c. competition between members
d. competition with other species
e. all of these choices limit exponential growth.
10) if light rays are not focused evenly on the retina, a fuzzy image is formed. this
condition is called
a. nearsightedness.
b. farsightedness.
c. astigmatism.
d. cataracts.
e. conduction deafness.
11) which is not true about the genetic code?
a. most amino acids have only one codon.
b. it is composed of a triplet code of three bases per codon.
c. it produces 64 different possibilities of base sequences.
d. it was cracked through the use of a cell-free system of enzymes.
e. it contains start and stop codons as instructions.
12) a moth-pollinated flower is likely to have
a. lightly colored flowers, no landing area, and strong sweet perfume.
b. white flowers with short tubes, a wide landing area, and no odor.
c. blue or yellow flowers, a wide landing area, and not very much odor.
d. blue or yellow flowers, a wide landing area, and no odor.
e. red flowers that open in daytime, a wide landing area, and an odor resembling dead
meat.
13) a 10% glucose solution is placed in the thistle tube. the thistle tube is placed in a
beaker that contains a 5% glucose solution. the solution in the thistle tube is _______ to
the solution in the beaker.
a. hypertonic
b. hypotonic
c. isotonic
d. none of the above
14) “jumping genes” that have the ability to move within and between chromosomes are
called
a. introns.
b. oncogenes.
c. transposons.
d. retroviruses.
e. exons.
15) what is the coenzyme used during the cellular respiration pathway to produce
oxidation?
a. nad+
b. nad-
c. nadp+
d. co_
16) during the sequencing of dna into a protein, what is the first step?
a. mrna is copied from a gene
b. a ribosome attaches to the mrna and signals protein synthesis
c. srp binds to the signal peptide to shut down synthesis
d. an enzyme removes the signal peptide from the peptide chain
17) introduction of alien or exotic species into new ecosystems occurs by
a. colonization when new settlers arrive in an area.
b. accidental transport by ship or plane without anyone’s knowledge.
c. agricultural and horticultural activities.
d. all of the choices are correct.