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1) which organisms use negative pressure to move air into the lungs?
a. ducks
b. iguanas
c. humans
d. mice
e. all of these use negative pressure to move air into their lungs.
2) the electron transport chain and chemiosmosis produces ______ atp from each nadh
and/or _________ atp from each fadh2 entering the system.
a. 4; 2
b. 3; 2
c. 2; 4
d. 2; 3
3) why is the secretion of uric acid beneficial to organisms that live in hot and dry
environments?
a. uric acid has poor solubility in water so it will become concentrated during excretion
as well as being relatively nontoxic.
b. uric acid has a high degree of solubility in water so it will become concentrated
during excretion as well as being relatively nontoxic.
c. uric acid has poor solubility in water so it will become concentrated during excretion
which allows the organism to use it as a defense mechanism.
d. uric acid can be readily reabsorbed by the urinary system so it decreases the amount
of waste produced by the organism.
4) at a synapse,
a. synaptic vesicles fuse with the postsynaptic membrane.
b. synaptic vesicles fuse with the pre-synaptic membrane.
c. neurotransmitters diffuse across the synaptic cleft.
d. neurotransmitters are actively transported across the synaptic cleft.
e. synaptic vesicles fuse with the pre-synaptic membrane and neurotransmitters diffuse
across the synaptic cleft.
5) nutrient molecules are taken back into the blood from the urinary filtrate by means of
a. tubular reabsorption.
b. tubular secretion.
c. osmosis.
d. glomerular filtration.
6) energy flow in an ecosystem begins with
a. omnivores.
b. herbivores.
c. autotrophs.
d. detritivores.
e. carnivores.
7) energy flow in an ecosystem is not cyclic because energy is
a. destroyed as it is used.
b. evenly spread out over many organisms.
c. converted to many kinds of useful energy.
d. increased as you go up the energy pyramid.
e. converted to heat, which is no longer useful.
8) maturation of b cells occurs in the
a. bone marrow.
b. lymph nodes.
c. spleen.
d. thymus.
e. peyer's patches.
9) all of the following are true regarding transgenic animals except
a. foreign genes are micro-injected into eggs, fertilized in vitro, and the zygotes are
placed in host females to develop.
b. the process has inserted bovine growth hormone into fish, cows, and other animals.
c. the process has been used to develop organisms that are partially animals and
partially plant.
d. the product desired by the transgenic procedure may be secreted in the milk of
female offspring.
10) at which stage of meiosis is each chromosome composed of a single chromatid?
a. prophase i
b. metaphase ii
c. anaphase ii
d. prophase ii
e. metaphase i
11) the notochord develops in which stage of embryonic development?
a. gastrulation
b. neurulation
c. blastulation
d. cleavage
