At what partial pressure of oxygen do half the heme groups in human blood have
oxygen bound?
a. 30 mm Hg
b. 100 mm Hg
c. 70 mm Hg
d. 104 mm Hg
e. all of these
The above photomicrograph is of
a. mycelium.
b. protistans.
c. mycorrhizae.
d. stolons.
e. rhizoids.
The hormone whose levels remain high when the body is suffering from inflammation
and stress is
a. cortisol.
b. somatotropin.
c. thymosin.
d. prolactin.
e. parathyroid hormone.
The atomic mass (mass number) of an atom is determined by the combined masses of
its
a. neutrons and protons.
b. neutrons and electrons.
c. protons and electrons.
d. protons, neutrons, and electrons.
e. neutrons, nucleus, and electrons.
An interaction between two species in which both species benefit is
a. mutualism.
b. parasitism.
c. commensalism.
d. competition.
e. predation.
Which of the following matches of plant hormone to agricultural application is
INCORRECT?
a. abscisic acid; becomes active when crops are subjected to drought
b. ethylene; permits unripe fruit to be shipped without damage for later ripening at
distribution centers
c. synthetic auxins; stimulates corn stalks to elongate
d. cytokinins; induces apples to ripen
e. gibberellins; stimulates roses to bloom
directional selection
Choose the most appropriate letter for each.
a. a reference point that implies stability of gene frequencies through generations
b. encompasses all of those actually or potentially interbreeding populations that are
reproductively isolated from other such groups
c. the genes of an entire population
d. the frequency of homozygous dominants in a population
e. the frequencies of dominant and recessive alleles in a population
f. the frequency of heterozygotes in a population
g. the frequency of homozygous recessives in a population
h. heterozygote advantage in regions where malaria is found
i. pesticide-resistant pests
The following questions refer to the figure above showing a fish gill filament.
A respiratory surface is indicated by
a. A.
b. B.
c. C.
d. D.
e. E.
Most of the ocean’s productivity occurs
a. in the open ocean.
b. in the intertidal zone.
c. in the neritic zone.
d. near hydrothermal vents.
e. in the benthic province.
In the experiment with Peacock butterflies, the working hypothesis is that
a. mimicry confuses both predator and prey.
b. mimicry conveys a selective advantage to the prey.
c. birds are capable of learning.
d. birds are agents of evolution.
e. unpalatable species display distinctive wings.
Barringer Crater in Arizona was formed when a 300,000-ton asteroid slammed into
Earth 50,000 years ago. Which of the following is true about this event?
a. It hit so early that it had little influence on the history of life.
b. This one produced about 150 times the energy of the bomb that hit Hiroshima.
c. Its impact produced a minor crater.
d. Scientists recently disproved that an asteroid impacted our planet just prior to the
mass extinctions at the K-T boundary.
e. An asteroid impact releases only minor amounts of energy.
Type A blood will NOT agglutinate when mixed with
a. type B blood.
b. type A blood.
c. type AB blood.
d. type O blood.
e. types A and O.
The figure above illustrates a(n)
a. FAD coenzyme.
b. cytosine nucleotide.
c. thymine nucleotide.
d. ATP molecule.
e. adenine nucleotide.
The following questions refer to the figure above.
Carnivores are indicated by
a. A.
b. B.
c. C.
d. D.
e. E.
Birds
Choose the one most appropriate letter for each.
a. cartilaginous skeleton; jaws
b. reptile with four-chambered heart
c. placental mammal
d. legless amphibian
e. invertebrate chordate; no metamorphosis
f. endotherm with feathers
g. limbless reptile
h. most primitive fishes with jaws; extinct
i. modern-day parasitic jawless vertebrate
j. marsupial
k. adult is called ‘sea squirt”
l. egg-laying mammal
m. swim bladder for buoyancy
n. may be sexually mature in larval form
Watson and Crick
Choose the one most appropriate answer for each.
a. discovered that the hereditary system of one strain of bacteria could be transformed
by the hereditary system from another strain of bacteria
b. first to discover DNA and isolate it from fish sperm
c. discovered that DNA-digesting enzymes prevented bacterial transformation
d. the first to build an accurate model of DNA and to describe it explicitly in a
publication
e. the first to demonstrate, through the use of radioactive isotopes, that DNA, not
protein, is the genetic material
f. provided two important clues to the structure of DNA; one clue is that A = T and the
other is that C = G
g. discovered the structure of collagen
h. obtained excellent X-ray diffraction photographs that suggested that DNA was a
long, thin molecule with regularly repeating units
Which of the following is not true of an individual with complete androgen insensitivity
syndrome?
a. She has female genitalia.
b. She has testes.
c. She is XY.
d. She does not have ovaries.
e. All of these are true.
Which of the following is NOT a function of some leukocytes?
a. engulf and destroy damaged or dead cells
b. engulf anything recognized as foreign
c. call up specific immune responses
d. carry out specific immune responses
e. secrete substances that initiate blood clotting
Body weight is related to
a. caloric intake.
b. energy utilization.
c. genes.
d. age and sex.
e. all of these.
Africanized bees ____ than European honeybees.
a. make less honey
b. respond more quickly to perceived threats
c. are more aggressive stingers
d. are more likely to abandon their colony after being disturbed
e. do all of these
climax community
Choose the most appropriate answer for each.
a. blending in and being hidden by the background
b. where an organism is generally located in a community
c. one organism benefits at another organism’s expense
d. traditionally a self-sustaining array of interacting organisms that is best suited for a
particular environment
e. lichens on newly hardened, newly cooled lava
f. robins and human populations
g. the yucca moth and the yucca
h. one species is eliminated from an area of niche overlap
i. tasty species resembles repugnant one
j. the process that leads from a pioneer community to a mature community
k. natural reforestation of burned-over forest
Select the best choice for the following statements using the five groups listed below.
a. apicomplexans
b. amoebozoans
c. euglenoids
d. dinoflagellates
e. trypanosomes
These move by means of pseudopods.
The correct operational sequence of the three processes listed below is
I. glycolysis
II. electron transport chain
III. Krebs cycle
a. I >>> II >>> III.
b. II >>> I >>> III.
c. III >>> I >>> II.
d. II >>> III >>> I.
e. I >>> III >>> II.
The following questions refer to the figure above of the life cycle of a pine.
Meiosis that produces microspores is indicated by
a. A.
b. B.
c. C.
d. D.
e. E.
Which of the following is NOT true of spindles?
a. They are permanent cell structures.
b. Centrosomes act as microtubule originating centers for spindles.
c. Some of their microtubules overlap at the cell equator.
d. Tubulin is the main component.
e. They are bipolar in their configuration.
What happens first following a neuron stimulation?
a. Sodium ions enter the cell.
b. Sodium ions leave the cell.
c. Potassium ions enter the cell.
d. Potassium ions leave the cell.
e. Potassium ions are involved in positive feedback.
Fermentation
Select the one most appropriate choice for each.
a. produces NADH and CO2; pyruvate oxidized
b. produces ATP, NADH, and CO2
c. splits glucose into two pyruvate molecules
d. regenerates NAD+ as pyruvate is converted to ethanol or lactate
e. uses a membrane-bound system that sets up production of ATP
Which of the following is not true of carbon monoxide?
a. it is a gas.
b. it is in automobile exhaust.
c. it is harmless.
d. it is odorless.
e. it is in cigarette smoke.
Protists cause all EXCEPT which of the following diseases?
a. dysentery
b. neurotoxic shellfish poisoning
c. malaria
d. AIDS
e. trichomonal infections of the reproductive tract
Respond to the following items in reference to the four cell types listed below.
a. sensory neurons
b. interneurons
c. motor neurons
d. Schwann cells
Cells that pick up environmental signals
Respond to the following statements with reference to the five biomes listed below.
a. tundra
b. grassland
c. desert
d. taiga
e. savanna
Conifers are most likely to be found in this biome.
Microspores
Choose the one most appropriate answer for each.
a. male spores of anthers
b. site where pollen tube usually penetrates the ovule
c. develops into a fruit at maturity
d. a 2n cell that will help form nutrients for the developing plant embryo
e. cluster of matured ovaries attached to a common receptacle
f. modified leaf with pigments and fragrance-producing cells
g. immature male gametophyte
h. female reproductive organ
i. landing platform for pollen
j. pollen-bearing structure
k. female spores of ovule
l. outermost whorl of leaf parts on a receptacle; generally green, but sometimes
pigmented
m. female gametophyte
n. matured ovaries of several flowers fused together into a single mass (for example,
pineapple, fig)
o. forms a seed at maturity
How many sperm would eventually be produced from 20 primary spermatocytes?
a. 10
b. 20
c. 40
d. 60
e. 80
Which of the following might be a possible follow-up experiment?
a. Repeat in a forest area totally devoid of native butterflies.
b. Repeat in a wildlife sanctuary aviary after giving birds a chance to learn about yellow
H. eleuchia.
c. Repeat using young, inexperienced birds.
d. Repeat, but count survivors for three weeks.
e. Conduct all of these.