NLN - ? Practice Test Science Pax Exam
All Correct Review 2023 A+
An organism with chloroplast in its cell is probably a - ANS-autotroph
autotrophs -
... [Show More] ANS-are organisms that produce their own food from inorganic substances,
plants are autotrophs
heterotrophs - ANS-obtain their food by consuming plants or other animals. They are
also referred to as consumers.
Primary consumers may be herbivores
herbivores - ANS-plant eaters
omnivores - ANS-plant and meat eaters
Secondary consumers - ANS-are carnivores, meat eaters, or omnivores that eat
herbivores.
Tertiary consumers are carnivores that eat - ANS-other carnivores or omnivores.
What property of water allows someone to fill a glass slightly above the rim without the
water flowing over? - ANS-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 - ANS-synapses
Which group of chemicals are not normally found in most living things? - ANS-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 - ANS-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 - ANS-provide greater surface area for
absorption
As light passes obliquely from air to water, it is bent. The bending is called - ANSrefraction
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 - ANS-refers to the spreading of light waves as they pass through a narrow
opening
reflection - ANS-occurs when light bounces off an object.
dispersion - ANS-occurs when light is separated into its spectrum
Which of the following organelles is not involved in protein synthesis? - ANSmitochondrion
To be absorbed by cells, proteins must be changed into - ANS-amino acids
A neuron that transmits impulses from the receptors to the spinal cord is called - ANS-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. -
ANS-or at the bottom of the incline.
Which group of organisms can helps prevent the accumulation of organic wastes in
nature? - ANS-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 - ANS-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
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