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NLN PAX SCIENCE VERSION 1 (NEW
2025/ 2026 UPDATE) QUESTIONS &
ANSWERS| GRADE A| 100% CORRECT
(VERIFIED SOLUTIONS)
Muscle tissue - ANS ✓skeletal, cardiac, and smooth
Epithelial tissue - ANS ✓skin, the lining of organs
Nervous tissue - ANS ✓neurons
Connective tissue - ANS ✓cartilage, blood, fat, bone
Organ - ANS ✓performs a specialized function in the body.
Organ system - ANS ✓made up of a number of organs working together to carry out
a major function.
Organism - ANS ✓the highest level of organization such as the human body
Evolution - ANS ✓is a theory regarding the processes that have produced the
biological diversity we see today.
Natural selection - ANS ✓the process by which the traits that promote or enhance an
organism's ability to survive and reproduce are passed on to following generations.
Adaptation - ANS ✓For natural selection to occur, organisms must have variations,
some of which give the individuals having them an advantage in the struggle for
survival. The struggle for survival occurs because each generation of a species
produces more offspring than can survive. In this struggle, the individuals best suited
to their environment survive ("survival of the fittest") and pass on the traits to their
offspring
Fossil record - ANS ✓consists of remnants or traces of organisms from past geologic
ages.
Vertebrates - ANS ✓animals with backbones
Biogeography - ANS ✓the geographical distribution of plants and animals
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Comparative anatomy - ANS ✓the comparison of organisms' structures
Comparative embryology - ANS ✓the comparison of organisms' embryos
Molecular biology - ANS ✓biology at the molecular level
Taxonomy - ANS ✓the study of scientific classification. Species are grouped
according to their similarities and differences.
King Phillip Came Over For Good Soup
Kingdom, Phylum, Class, Order, Family, Genus, Species
Kingdom - ANS ✓animal, plant, monera, protist, and fungi
Monera - ANS ✓Bacteria
Protist - ANS ✓Protozoa, algae, and some molds
Fungi - ANS ✓Molds, muchrooms, yeasts, and the like
Active transport - ANS ✓involves the use of energy in the form of ATP to move
substances across the membrane
Passive transport - ANS ✓does not require energy and makes use of didffusion and
filtration
Diffusion - ANS ✓particles move in a random manner, spreading evenly throughout
an available space and moving from regions of high concentration to those of low
concentration.
Osmosis - ANS ✓A specific type of diffusion is that of water. Water moves from an
area of high water concentration (or low concentration) to an area of low water
concentration (high particle concentration
Isotonic - ANS ✓When the solute concentration of the water is the same as that
inside the cell. Thus, the amount of water that leaves the cell and the amount that
enters it are equal.
Hypertonic - ANS ✓When the solute is more concentrated outside the cell than
inside it. Water leaves the cell due to osmosis; it moves from the high-water/low-
particle concentration to low-water/high-particle concentration. As a result, the cell
shrinks.
Hypotonic - ANS ✓If the solute concentration outside the cell is lower than that
inside the cell. Water flows into the cell (again high-water/low-particle concentration
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to low-water/high-particle concentration). If the flow continues long enough, the cell
bursts.
Filtration - ANS ✓the movement of water and solutes through the membrane by fluid,
or hydrostatic, pressure.
Autotrophs - ANS ✓are organisms that produce their own food from inorganic
substances. Plants are these.
Heterotrophs - ANS ✓obtain their food by consuming plants or other animals. They
are also referred to as consumers.
Primary consumers - ANS ✓may be herbivores or omnivores
Secondary consumers - ANS ✓are carnivores or omnivores that eat herbivores
Tertiary consumers - ANS ✓are carnivores that eat other carnivores or omnivores
Herbivores - ANS ✓plant eaters
Omnivores - ANS ✓plant and meat eaters
Carnivores - ANS ✓meat eaters
Trophic levels and ecosystem - ANS ✓These divisions, which are made on the basis
of how the organism meets its nutritiional needs. The autotrophs are the most
improtant trophic level in the ecosystem and are known as producers; the other
levels are mad eup of the different types of consumers.
Food chain - ANS ✓The path along which food is transferred from level to level.
Food web - ANS ✓The interrelationship of many food chains
Decomposers - ANS ✓An important role in an ecosystem is played by organisms
such as bacteria and fungi, which consume nonliving organic material and release
inorganic material. Thus material is recycled through the ecosystem, and inorganic
material is made available to the plants.
Biotic factors - ANS ✓include the living parts of the ecosystem
Abiotic factors - ANS ✓nonliving influences, such as temperature, humidity, or soil
composition.
Predator - ANS ✓Eats prey
Prey - ANS ✓gets eaten
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