NLN Pax Science UPDATED ACTUAL
Questions and CORRECT Answers
A person blows his breath into a straw that is placed in limewater. The limewater becomes
cloudy because the person's breath contains: - CORRECT ANSWER✔✔- 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 ANSWER✔✔- ruptured
platelets release thromboplastin
A student focuses sunlight to a point with a thin converging (convex) lens. Which of these
direct measurements can the student make as a result of this experiment? - CORRECT
ANSWER✔✔- the approximate focal length of the lens
In ecological succession, the first living thing to colonize a hitherto barren area is called a: -
CORRECT ANSWER✔✔- pioneer organism
Unicellular organisms that have a nucleus and can swim with the aid of cilia are examples of:
- CORRECT ANSWER✔✔- protozoans
Which of these conditions is associated with smoking? - CORRECT ANSWER✔✔-
emphysema
Which of these quantities is most closely associated with an object's inertia? - CORRECT
ANSWER✔✔- Mass
Which of these sequences of anatomic organization, from the simplest level to the most
complex, is the correct sequence? - CORRECT ANSWER✔✔- From tissue, organ, organ
system to organism
Which part of the cell structure controls the passage of materials into and out of the cell? -
CORRECT ANSWER✔✔- Plasma membrane
,While working in the chemistry laboratory, a student spills dilute hydrochloric acid on her
hand. What is the first action this student should take? - CORRECT ANSWER✔✔- Flush
her hand with large quantities of water
Within a living cell, the oxygen (O2) from a mixture of O2 and carbon dioxide (CO2) is used
up. This creates a concentration gradient across the cell membrane, drawing O2 across the
membrane from the outside in, a process known as - CORRECT ANSWER✔✔- Diffusion
You cut your finger rather deeply while slicing an apple. Which of these actions should you
take first? - CORRECT ANSWER✔✔- Wash the wound continuously with cold running
water
30 students in a class carefully measure the length and width of 20 peanut shells. They also
count the number and note the size of the peanuts inside. This information is recorded on
various graphs showing the numbers of nuts and the different sizes. The collected evidence of
the peanuts gives the students an idea of the extent of: - CORRECT ANSWER✔✔- variation
within a species
A *tincture* is a solution in which: - CORRECT ANSWER✔✔- alcohol is the solvent
All the glucose filtered from the blood in the glomerulus into the Bowman's capsule of the
kidney nephron is returned to the tissue fluid while passing along the proximal tubule. This
rapid return is effected by the process of: - CORRECT ANSWER✔✔- active transport
If the night temperature drops 50 degrees, the roadrunner's internal energy-conservation
permits a lowering of body temperature to: - CORRECT ANSWER✔✔- 94°F
1 kilogram (kg) of solid X at 10C and 1 kg of solid Y 10C each absorb 5 joules of heat
energy. The final temperatures on X and Y is 15C and 20C, respectively. Compared to X, Y
must have a lower:F - CORRECT ANSWER✔✔- specific heat
A woman suddenly chokes on a piece of food and clutches frantically at her throat. An
immediate remedy is to: - CORRECT ANSWER✔✔- apply quick, hard pressures
successively to her abdomen, just below her diaphragm
, An unknown gas is more dense than air, does not support combustion, and turns a limewater
solution cloudy. This gas is most probably: - CORRECT ANSWER✔✔- carbon dioxide
Night blindness in humans is caused by a lack of: - CORRECT ANSWER✔✔- Vitamin A
In varieties of matter, the term heterogeneous may be applied to: - CORRECT ANSWER✔✔-
mixtures, but not elements or compounds
The atoms of an element with seven valence electrons are most probably classified as: -
CORRECT ANSWER✔✔- nonmetals
The inherited factors that are transmitted in a organism from generation to generation are
called its: - CORRECT ANSWER✔✔- genotype
Which of these conditions is associated with smoking? - CORRECT ANSWER✔✔-
Emphysema
Within which of these structures of the female reproductive tract is the human egg fertilized?
- CORRECT ANSWER✔✔- Fallopian tube
A cell which manufactures a large amount of protein for export would have an abundance of
organelles called: - CORRECT ANSWER✔✔- ribosomes
A lens that focuses distant light to a single point is known as a : - CORRECT ANSWER✔✔-
converging (convex) lens
A substance composed of similar atoms (number of protons is the same for all) that can not
be broken down chemically is a(n) - CORRECT ANSWER✔✔- element
Charles Darwin's theory of evolution suggests that the reason for the various differences
between species is a result of: - CORRECT ANSWER✔✔- natural selection
Questions and CORRECT Answers
A person blows his breath into a straw that is placed in limewater. The limewater becomes
cloudy because the person's breath contains: - CORRECT ANSWER✔✔- 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 ANSWER✔✔- ruptured
platelets release thromboplastin
A student focuses sunlight to a point with a thin converging (convex) lens. Which of these
direct measurements can the student make as a result of this experiment? - CORRECT
ANSWER✔✔- the approximate focal length of the lens
In ecological succession, the first living thing to colonize a hitherto barren area is called a: -
CORRECT ANSWER✔✔- pioneer organism
Unicellular organisms that have a nucleus and can swim with the aid of cilia are examples of:
- CORRECT ANSWER✔✔- protozoans
Which of these conditions is associated with smoking? - CORRECT ANSWER✔✔-
emphysema
Which of these quantities is most closely associated with an object's inertia? - CORRECT
ANSWER✔✔- Mass
Which of these sequences of anatomic organization, from the simplest level to the most
complex, is the correct sequence? - CORRECT ANSWER✔✔- From tissue, organ, organ
system to organism
Which part of the cell structure controls the passage of materials into and out of the cell? -
CORRECT ANSWER✔✔- Plasma membrane
,While working in the chemistry laboratory, a student spills dilute hydrochloric acid on her
hand. What is the first action this student should take? - CORRECT ANSWER✔✔- Flush
her hand with large quantities of water
Within a living cell, the oxygen (O2) from a mixture of O2 and carbon dioxide (CO2) is used
up. This creates a concentration gradient across the cell membrane, drawing O2 across the
membrane from the outside in, a process known as - CORRECT ANSWER✔✔- Diffusion
You cut your finger rather deeply while slicing an apple. Which of these actions should you
take first? - CORRECT ANSWER✔✔- Wash the wound continuously with cold running
water
30 students in a class carefully measure the length and width of 20 peanut shells. They also
count the number and note the size of the peanuts inside. This information is recorded on
various graphs showing the numbers of nuts and the different sizes. The collected evidence of
the peanuts gives the students an idea of the extent of: - CORRECT ANSWER✔✔- variation
within a species
A *tincture* is a solution in which: - CORRECT ANSWER✔✔- alcohol is the solvent
All the glucose filtered from the blood in the glomerulus into the Bowman's capsule of the
kidney nephron is returned to the tissue fluid while passing along the proximal tubule. This
rapid return is effected by the process of: - CORRECT ANSWER✔✔- active transport
If the night temperature drops 50 degrees, the roadrunner's internal energy-conservation
permits a lowering of body temperature to: - CORRECT ANSWER✔✔- 94°F
1 kilogram (kg) of solid X at 10C and 1 kg of solid Y 10C each absorb 5 joules of heat
energy. The final temperatures on X and Y is 15C and 20C, respectively. Compared to X, Y
must have a lower:F - CORRECT ANSWER✔✔- specific heat
A woman suddenly chokes on a piece of food and clutches frantically at her throat. An
immediate remedy is to: - CORRECT ANSWER✔✔- apply quick, hard pressures
successively to her abdomen, just below her diaphragm
, An unknown gas is more dense than air, does not support combustion, and turns a limewater
solution cloudy. This gas is most probably: - CORRECT ANSWER✔✔- carbon dioxide
Night blindness in humans is caused by a lack of: - CORRECT ANSWER✔✔- Vitamin A
In varieties of matter, the term heterogeneous may be applied to: - CORRECT ANSWER✔✔-
mixtures, but not elements or compounds
The atoms of an element with seven valence electrons are most probably classified as: -
CORRECT ANSWER✔✔- nonmetals
The inherited factors that are transmitted in a organism from generation to generation are
called its: - CORRECT ANSWER✔✔- genotype
Which of these conditions is associated with smoking? - CORRECT ANSWER✔✔-
Emphysema
Within which of these structures of the female reproductive tract is the human egg fertilized?
- CORRECT ANSWER✔✔- Fallopian tube
A cell which manufactures a large amount of protein for export would have an abundance of
organelles called: - CORRECT ANSWER✔✔- ribosomes
A lens that focuses distant light to a single point is known as a : - CORRECT ANSWER✔✔-
converging (convex) lens
A substance composed of similar atoms (number of protons is the same for all) that can not
be broken down chemically is a(n) - CORRECT ANSWER✔✔- element
Charles Darwin's theory of evolution suggests that the reason for the various differences
between species is a result of: - CORRECT ANSWER✔✔- natural selection
