1) when conditions are unfavorable, some gram positive bacteria form
a. pili.
b. endospores.
c. galls.
d. capsules.
e. thylakoids.
2) if the ureter was blocked due to the development of a tumor preventing the normal
flow of urine,which region of the kidney would be impacted first?
a. collecting duct
b. renal cortex
c. distal convoluted tubule
d. proximal convoluted tubule
e. glomerular capsule
3) ovules are contained within the
a. ovary.
b. stigma.
c. anther.
d. filament.
e. style.
4) which of the following domains includes the majority of the organisms that were
previously classified in kingdom monera?
a. bacteria and eubacteria
b. protista and eukarya
c. archaea and algae
d. eukarya and bacteria
e. archaea and bacteria
5) the same hormone has considerably different effects in different species. the hormone
thyroxin in humans stimulates metabolism, but in frogs it induces metamorphosis from
tadpole to adult frog. this indicates that
a. the target tissues have evolved different responses.
b. metamorphosis is caused by a change in body metabolism.
c. the organisms have absolutely no evolutionary relationship.
d. the chemical composition of the hormone is actually slightly different.
e. the origin of the hormone makes a difference in the effect the hormone has on target
tissues.
6) the main nitrogenous waste excreted by terrestrial amphibians and mammals is
a. urea.
b. uric acid.
c. amino acid.
d. ammonia.
e. uracil.
7) a male accessory organ of the reproductive system that often becomes enlarged,
infected, or cancerous in older men is the
a. testis.
b. prostate gland.
c. epididymis.
d. bulbourethral gland.
e. vas deferens.
8) major regional groups of interacting terrestrial ecosystems, characterized by climate
and geography, are called
a. biospheres.
b. estuaries.
c. tundras.
d. taigas.
e. biomes.
9) which body structure describes the freshwater hydra?
a. a swimming medusa with the mouth pointing downward
b. a swimming medusa with the mouth pointing upward
c. a sessile medusa with the mouth pointing upward
d. a sessile polyp form with the mouth pointing downward
e. a freely moving polyp with the mouth pointing upward
10) a university biology department wishes to hire a scientist to work on the
relationships among the wolves, moose, trees and physical features on an island. if you
were charged with writing the job description, you should title the position
a. population geneticist.
b. molecular biologist.
c. community ecologist.
d. organismal physiologist.
e. island zoologist.
11) _______ when the number of individuals taken from a wild population is so great
that the population becomes severely reduced in number.
a. overexploitation occurs
b. a source population is formed
c. an “edge effect” occurs
d. eutrophication occurs
12) which of the following terms best describes the collection of scientific data through
observation in the field, such as observing the behavior of birds?
a. a scientific model
b. an experiment
c. descriptive research
d. a scientific theory or principle
e. experimental results
13) to carry out a polymerase chain reaction (pcr), you must have dna polymerase and
a. a blueprint or gene map of the sequence you wish to copy.
b. the nucleotides to synthesize new dna strands.
c. a dna synthesizer machine.
d. a dna probe.