NLN Science practice test (correct answers)
A drop of dilute ammonium hydroxide (NH4OH) is placed on one side of the slide
containing a large number of swimming parmecium. Under this condition, which of these
behaviors of the paramecia will be observed? correct answers they will eventually all
swim toward the ammonium hydroxide
they will show no net change in behavior to the ammonium hydroxide
they will all be instantly killed by the ammonium hydroxide
they will eventually all swim away from the ammonium hydroxide
they will eventually all swim away from the ammonium hydroxide
A method for determining the blood alcohol content of a subject is to? correct answers
do a Mantoux test
do a dick test
use a breathalyzer
inspect the size of the pupils
use a breathalyzer
A person blows his breath into a straw that is placed in limewater. The limewater
becomes cloudy because the person's breath contains? correct answers carbon dioxide
hydrogen
oxygen
nitrogen
carbon dioxide
A person who was in an auto accident has formed a blood clot at the site of the injury.
One event that can lead to formation of a blood clot is that? correct answers red blood
cells release hemoglobin
bone marrow cells decrease platelet production
white blood cells release antibodies
ruptured platelets release thromboplastin
ruptured platelets release thromboplastin
An unknown gas is more dense than air, does not support combustion, and turns a
limewater solution cloudy. This gas is most probably? correct answers ammonia
methane
carbon dioxide
hydrogen
carbon dioxide
, Guard cells which can be found in the leaves of plants are most closely associated with
which of these processes? correct answers reproduction of a new plant
evaporation of water from the plant
synthesis of organic substances in the plant
movement of organic and inorganic substances from soil to the plant
Human testes produce? correct answers eggs
follicle stimulating hormones
growth hormone
spermatozoa
spermatozoa
If a red light is passed through a dilute solution of chlorophyll solution, the
spectrophotometer will detect what amount of transmittance of this light? correct
answers 100%
50-75%
less than 25%
none
50-75%
If the medulla of the brain in a human was damaged, which of these conditions would
most liekly result? correct answers inability to remember
difficultly in breathing
inability to speak
blurred vision
difficultly breathing
In ecological succession, the first living thing to colonize a hitherto barren area is called
a? correct answers producer
primary consumer
pioneer organism
carnivore
pioneer organism
In varieties of matter, the term heterogeneous may be applied to? correct answers
elements, but not compounds
compounds, but not elements
compounds and elements, but not mixture
mixtures, but not elements or compounds
mixtures, but not elements or compounds
A drop of dilute ammonium hydroxide (NH4OH) is placed on one side of the slide
containing a large number of swimming parmecium. Under this condition, which of these
behaviors of the paramecia will be observed? correct answers they will eventually all
swim toward the ammonium hydroxide
they will show no net change in behavior to the ammonium hydroxide
they will all be instantly killed by the ammonium hydroxide
they will eventually all swim away from the ammonium hydroxide
they will eventually all swim away from the ammonium hydroxide
A method for determining the blood alcohol content of a subject is to? correct answers
do a Mantoux test
do a dick test
use a breathalyzer
inspect the size of the pupils
use a breathalyzer
A person blows his breath into a straw that is placed in limewater. The limewater
becomes cloudy because the person's breath contains? correct answers carbon dioxide
hydrogen
oxygen
nitrogen
carbon dioxide
A person who was in an auto accident has formed a blood clot at the site of the injury.
One event that can lead to formation of a blood clot is that? correct answers red blood
cells release hemoglobin
bone marrow cells decrease platelet production
white blood cells release antibodies
ruptured platelets release thromboplastin
ruptured platelets release thromboplastin
An unknown gas is more dense than air, does not support combustion, and turns a
limewater solution cloudy. This gas is most probably? correct answers ammonia
methane
carbon dioxide
hydrogen
carbon dioxide
, Guard cells which can be found in the leaves of plants are most closely associated with
which of these processes? correct answers reproduction of a new plant
evaporation of water from the plant
synthesis of organic substances in the plant
movement of organic and inorganic substances from soil to the plant
Human testes produce? correct answers eggs
follicle stimulating hormones
growth hormone
spermatozoa
spermatozoa
If a red light is passed through a dilute solution of chlorophyll solution, the
spectrophotometer will detect what amount of transmittance of this light? correct
answers 100%
50-75%
less than 25%
none
50-75%
If the medulla of the brain in a human was damaged, which of these conditions would
most liekly result? correct answers inability to remember
difficultly in breathing
inability to speak
blurred vision
difficultly breathing
In ecological succession, the first living thing to colonize a hitherto barren area is called
a? correct answers producer
primary consumer
pioneer organism
carnivore
pioneer organism
In varieties of matter, the term heterogeneous may be applied to? correct answers
elements, but not compounds
compounds, but not elements
compounds and elements, but not mixture
mixtures, but not elements or compounds
mixtures, but not elements or compounds
