PAX SCIENCE NLN EXAMS FINAL PREPARATION
MANUAL 2026
◉ autotrophs. Answer: are organisms that produce their own food
from inorganic substances, plants are autotrophs
◉ heterotrophs. Answer: obtain their food by consuming plants or
other animals. They are also referred to as consumers.
Primary consumers may be herbivores
◉ herbivores. Answer: plant eaters
◉ omnivores. Answer: plant and meat eaters
◉ Secondary consumers. Answer: are carnivores, meat eaters, or
omnivores that eat herbivores.
◉ Tertiary consumers are carnivores that eat. Answer: other
carnivores or omnivores.
,◉ What property of water allows someone to fill a glass slightly
above the rim without the water flowing over?. Answer: 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. Answer: synapses
◉ Which group of chemicals are not normally found in most living
things?. Answer: 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. Answer: 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. Answer:
provide greater surface area for absorption
◉ As light passes obliquely from air to water, it is bent. The bending
is called. Answer: 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. Answer: refers to the spreading of light waves as they
pass through a narrow opening
◉ reflection. Answer: occurs when light bounces off an object.
◉ dispersion. Answer: occurs when light is separated into its
spectrum
◉ Which of the following organelles is not involved in protein
synthesis?. Answer: mitochondrion
, ◉ To be absorbed by cells, proteins must be changed into. Answer:
amino acids
◉ A neuron that transmits impulses from the receptors to the spinal
cord is called. Answer: 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.. Answer: or at the bottom of
the incline.
◉ Which group of organisms can helps prevent the accumulation of
organic wastes in nature?. Answer: 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. Answer: 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
MANUAL 2026
◉ autotrophs. Answer: are organisms that produce their own food
from inorganic substances, plants are autotrophs
◉ heterotrophs. Answer: obtain their food by consuming plants or
other animals. They are also referred to as consumers.
Primary consumers may be herbivores
◉ herbivores. Answer: plant eaters
◉ omnivores. Answer: plant and meat eaters
◉ Secondary consumers. Answer: are carnivores, meat eaters, or
omnivores that eat herbivores.
◉ Tertiary consumers are carnivores that eat. Answer: other
carnivores or omnivores.
,◉ What property of water allows someone to fill a glass slightly
above the rim without the water flowing over?. Answer: 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. Answer: synapses
◉ Which group of chemicals are not normally found in most living
things?. Answer: 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. Answer: 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. Answer:
provide greater surface area for absorption
◉ As light passes obliquely from air to water, it is bent. The bending
is called. Answer: 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. Answer: refers to the spreading of light waves as they
pass through a narrow opening
◉ reflection. Answer: occurs when light bounces off an object.
◉ dispersion. Answer: occurs when light is separated into its
spectrum
◉ Which of the following organelles is not involved in protein
synthesis?. Answer: mitochondrion
, ◉ To be absorbed by cells, proteins must be changed into. Answer:
amino acids
◉ A neuron that transmits impulses from the receptors to the spinal
cord is called. Answer: 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.. Answer: or at the bottom of
the incline.
◉ Which group of organisms can helps prevent the accumulation of
organic wastes in nature?. Answer: 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. Answer: 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
