NLN Practice Test Science Pax Exam (correct answers)
An organism with chloroplast in its cell is probably a correct answers autotroph
Autotrophs correct answers are organisms that produce their own food from inorganic
substances, plants are autotrophs
Heterotrophs correct answers obtain their food by consuming plants or other animals.
They are also referred to as consumers.
Primary consumers may be herbivores
herbivores correct answers plant eaters
omnivores correct answers plant and meat eaters
Secondary consumers correct answers are carnivores, meat eaters, or omnivores that
eat herbivores.
Tertiary consumers are carnivores that eat correct answers other carnivores or
omnivores.
What property of water allows someone to fill a glass slightly above the rim without the
water flowing over? correct answers surface tension
Water molecules are polar. This is due to the fact that oxygen draws the electrons in the
molecule toward itself. Thus, there is a negative charge surrounding the oxygen and a
positive charge around the hydrogen. The unbalanced charges cause the water
molecules to cluster, and this gives the water the properties called surface tension.
Surface tension is the the attraction between molecules at the surface of a liquid, which
allows a glass to be filled above the rim without the water flowing over.
The gap between the neurons are called correct answers synapses
Which group of chemicals are not normally found in most living things? correct answers
silicates
Carbohydrates, proteins and nucleic acids (RNA and DNA) are all very important
chemicals in living things.
Silicates examples are in sand and glass
The alimentary canal is associated with the correct answers the whole passage along
which food passes through the body from mouth to anus. It includes the esophagus,
stomach, and intestines.
digestive tract
,The numerous villi in the small intestine serve to correct answers provide greater
surface area for absorption
As light passes obliquely from air to water, it is bent. The bending is called correct
answers refraction
refraction is the bending of light as it passes obliquely from one medium to another, in
this case from air to water. The speed of light wave changes changes when it changes
media. When the light wave enters the second medium at an oblique angle, it changes
direction; the light wave is bent.
diffraction correct answers refers to the spreading of light waves as they pass through a
narrow opening
reflection correct answers occurs when light bounces off an object.
dispersion correct answers occurs when light is separated into its spectrum
Which of the following organelles is not involved in protein synthesis? correct answers
mitochondrion
To be absorbed by cells, proteins must be changed into correct answers amino acids
A neuron that transmits impulses from the receptors to the spinal cord is called correct
answers a sensory neuron
Potential energy can be thought of a function of height. Since total energy is always
conserved, the kinetic energy is at its maximum when the potential is at its minimum.
correct answers or at the bottom of the incline.
Which group of organisms can helps prevent the accumulation of organic wastes in
nature? correct answers mosses is an algae
the correct answer is bacteria = bacteria comprise the decomposer portion of the food
chain. They are responsible for recycling organic material into inorganic material that
plants can use to undergo photosynthesis.
As the eardrum is made to vibrate more rapidly, the sound is perceived as correct
answers higher in pitch
high pitch sounds are heard when the receptor cells closer to the oval window are
stimulated, and low-pitch sounds result from the stimulation of the cells that are farther
down the cochlea. The more rapid the vibration is, the higher the pitch
, In a field of pure white asters, a grower noticed a single blue aster. How could the
grower test whether this change affected the gamete-producing cells of the plant?
correct answers self-pollinate the flower, and plant the resulting seeds.
Self pollination would allow the plant to produce gametes sperm and eggs that would
unite and form seeds. Observing the color of the plants from these seeds would allow
the planter to determine whether this change occurred at the level of the gametes.
A human egg will develop into a female if it is fertilized by a sperm containing correct
answers XX chromosome
XY - male`
In a food chain involving grass, grasshoppers, birds, and mammals, the original source
of energy is correct answers sunlight
Which of the following is an neutralization reaction?
H2CO3 + Ca(OH)2 ---> 2H2O + CaCO3
Is an reaction between an acid (carbonic acid) and a base [Ca(OH)2] to form water and
a salt. correct answers A reaction that removes essentially all H+ and OH-
In the context of a chemical reaction the term neutralization is used for a reaction
between an acid and a base
acid + base → salt + water
Acids are ionic compounds ( a compound with a positive or negative charge) that break
apart in water to form a hydrogen ion (H+).
Example: HCl (Hydrochloric acid) in water
*Bases are ionic compounds that break apart to form a negatively charged hydroxide
ion (OH-) in water.
Example: NaOH (Sodium Hydroxide-a strong base) in water
When oxygen goes from air in the lungs into the blood, it does so by correct answers
diffusion
Which of the following organs controls the amount of calcium in the blood?
parathyroid correct answers They produce parathyroid hormone. Parathyroid hormone
(PTH, parathormone) works antagonistically with calcitonin, which is produced in the
thyroid gland. When calcium levels in the blood are low, PTH causes bone cells to
break down and release calcium. When calcium levels are high, calcitonin causes
calcium to deposit onto the bones.
An organism with chloroplast in its cell is probably a correct answers autotroph
Autotrophs correct answers are organisms that produce their own food from inorganic
substances, plants are autotrophs
Heterotrophs correct answers obtain their food by consuming plants or other animals.
They are also referred to as consumers.
Primary consumers may be herbivores
herbivores correct answers plant eaters
omnivores correct answers plant and meat eaters
Secondary consumers correct answers are carnivores, meat eaters, or omnivores that
eat herbivores.
Tertiary consumers are carnivores that eat correct answers other carnivores or
omnivores.
What property of water allows someone to fill a glass slightly above the rim without the
water flowing over? correct answers surface tension
Water molecules are polar. This is due to the fact that oxygen draws the electrons in the
molecule toward itself. Thus, there is a negative charge surrounding the oxygen and a
positive charge around the hydrogen. The unbalanced charges cause the water
molecules to cluster, and this gives the water the properties called surface tension.
Surface tension is the the attraction between molecules at the surface of a liquid, which
allows a glass to be filled above the rim without the water flowing over.
The gap between the neurons are called correct answers synapses
Which group of chemicals are not normally found in most living things? correct answers
silicates
Carbohydrates, proteins and nucleic acids (RNA and DNA) are all very important
chemicals in living things.
Silicates examples are in sand and glass
The alimentary canal is associated with the correct answers the whole passage along
which food passes through the body from mouth to anus. It includes the esophagus,
stomach, and intestines.
digestive tract
,The numerous villi in the small intestine serve to correct answers provide greater
surface area for absorption
As light passes obliquely from air to water, it is bent. The bending is called correct
answers refraction
refraction is the bending of light as it passes obliquely from one medium to another, in
this case from air to water. The speed of light wave changes changes when it changes
media. When the light wave enters the second medium at an oblique angle, it changes
direction; the light wave is bent.
diffraction correct answers refers to the spreading of light waves as they pass through a
narrow opening
reflection correct answers occurs when light bounces off an object.
dispersion correct answers occurs when light is separated into its spectrum
Which of the following organelles is not involved in protein synthesis? correct answers
mitochondrion
To be absorbed by cells, proteins must be changed into correct answers amino acids
A neuron that transmits impulses from the receptors to the spinal cord is called correct
answers a sensory neuron
Potential energy can be thought of a function of height. Since total energy is always
conserved, the kinetic energy is at its maximum when the potential is at its minimum.
correct answers or at the bottom of the incline.
Which group of organisms can helps prevent the accumulation of organic wastes in
nature? correct answers mosses is an algae
the correct answer is bacteria = bacteria comprise the decomposer portion of the food
chain. They are responsible for recycling organic material into inorganic material that
plants can use to undergo photosynthesis.
As the eardrum is made to vibrate more rapidly, the sound is perceived as correct
answers higher in pitch
high pitch sounds are heard when the receptor cells closer to the oval window are
stimulated, and low-pitch sounds result from the stimulation of the cells that are farther
down the cochlea. The more rapid the vibration is, the higher the pitch
, In a field of pure white asters, a grower noticed a single blue aster. How could the
grower test whether this change affected the gamete-producing cells of the plant?
correct answers self-pollinate the flower, and plant the resulting seeds.
Self pollination would allow the plant to produce gametes sperm and eggs that would
unite and form seeds. Observing the color of the plants from these seeds would allow
the planter to determine whether this change occurred at the level of the gametes.
A human egg will develop into a female if it is fertilized by a sperm containing correct
answers XX chromosome
XY - male`
In a food chain involving grass, grasshoppers, birds, and mammals, the original source
of energy is correct answers sunlight
Which of the following is an neutralization reaction?
H2CO3 + Ca(OH)2 ---> 2H2O + CaCO3
Is an reaction between an acid (carbonic acid) and a base [Ca(OH)2] to form water and
a salt. correct answers A reaction that removes essentially all H+ and OH-
In the context of a chemical reaction the term neutralization is used for a reaction
between an acid and a base
acid + base → salt + water
Acids are ionic compounds ( a compound with a positive or negative charge) that break
apart in water to form a hydrogen ion (H+).
Example: HCl (Hydrochloric acid) in water
*Bases are ionic compounds that break apart to form a negatively charged hydroxide
ion (OH-) in water.
Example: NaOH (Sodium Hydroxide-a strong base) in water
When oxygen goes from air in the lungs into the blood, it does so by correct answers
diffusion
Which of the following organs controls the amount of calcium in the blood?
parathyroid correct answers They produce parathyroid hormone. Parathyroid hormone
(PTH, parathormone) works antagonistically with calcitonin, which is produced in the
thyroid gland. When calcium levels in the blood are low, PTH causes bone cells to
break down and release calcium. When calcium levels are high, calcitonin causes
calcium to deposit onto the bones.
