Environment Shapes Traits - Middle School Life Science
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Identify the most advantageous coloration in a snowy habitat: white fur or dark fur.
Identify the most advantageous coloration in a snowy habitat: white fur or dark fur.
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white fur. Blends with snow for protection from predators.
white fur. Blends with snow for protection from predators.
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Identify the trait most likely favored when food is hard-shelled seeds: strong beak or long tongue.
Identify the trait most likely favored when food is hard-shelled seeds: strong beak or long tongue.
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Strong beak. Strong beaks can crack hard shells to access food inside.
Strong beak. Strong beaks can crack hard shells to access food inside.
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Which option is a biotic environmental condition: temperature or predators?
Which option is a biotic environmental condition: temperature or predators?
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Predators. Living factors like predators are biotic; non-living like temperature are abiotic.
Predators. Living factors like predators are biotic; non-living like temperature are abiotic.
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Which option is an abiotic environmental condition: parasites or rainfall?
Which option is an abiotic environmental condition: parasites or rainfall?
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Rainfall. Non-living factors like rainfall are abiotic; living factors are biotic.
Rainfall. Non-living factors like rainfall are abiotic; living factors are biotic.
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Identify the environmental change most likely to favor thicker fur: colder winters or fewer predators.
Identify the environmental change most likely to favor thicker fur: colder winters or fewer predators.
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Colder winters. Thicker fur provides better insulation against cold temperatures.
Colder winters. Thicker fur provides better insulation against cold temperatures.
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Identify the trait most likely favored in a desert with scarce water: waxy leaves or large thin leaves.
Identify the trait most likely favored in a desert with scarce water: waxy leaves or large thin leaves.
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Waxy leaves. Waxy coating reduces water loss through evaporation in dry conditions.
Waxy leaves. Waxy coating reduces water loss through evaporation in dry conditions.
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Which trait is most advantageous in a dark cave environment: functional eyes or enhanced touch?
Which trait is most advantageous in a dark cave environment: functional eyes or enhanced touch?
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Enhanced touch. Touch helps navigation when vision is useless in complete darkness.
Enhanced touch. Touch helps navigation when vision is useless in complete darkness.
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Identify the trait most likely favored where predators hunt by sight: camouflage or bright coloration.
Identify the trait most likely favored where predators hunt by sight: camouflage or bright coloration.
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Camouflage. Blending with surroundings helps prey avoid visual predators.
Camouflage. Blending with surroundings helps prey avoid visual predators.
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Which trait is most advantageous in a snowy habitat: white fur or dark fur?
Which trait is most advantageous in a snowy habitat: white fur or dark fur?
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White fur. White fur provides camouflage against snow from predators and prey.
White fur. White fur provides camouflage against snow from predators and prey.
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What does it mean that selection is environment-dependent?
What does it mean that selection is environment-dependent?
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A trait can be beneficial in one environment and harmful in another. Environmental context determines whether a trait helps or harms survival.
A trait can be beneficial in one environment and harmful in another. Environmental context determines whether a trait helps or harms survival.
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What is an advantageous trait in a specific environment?
What is an advantageous trait in a specific environment?
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A trait that increases survival and reproduction in that environment. Helps organisms survive and produce more offspring in specific conditions.
A trait that increases survival and reproduction in that environment. Helps organisms survive and produce more offspring in specific conditions.
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Which term describes a factor in the environment that affects survival or reproduction?
Which term describes a factor in the environment that affects survival or reproduction?
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Selective pressure. Environmental factors that influence which organisms survive and reproduce.
Selective pressure. Environmental factors that influence which organisms survive and reproduce.
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What is fitness in evolutionary biology?
What is fitness in evolutionary biology?
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Reproductive success relative to others in the population. Measures how many viable offspring an organism produces compared to others.
Reproductive success relative to others in the population. Measures how many viable offspring an organism produces compared to others.
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Identify the outcome most likely after pesticides are applied repeatedly: more susceptible insects or more resistant insects.
Identify the outcome most likely after pesticides are applied repeatedly: more susceptible insects or more resistant insects.
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More resistant insects. Pesticides kill susceptible insects, leaving resistant ones to reproduce.
More resistant insects. Pesticides kill susceptible insects, leaving resistant ones to reproduce.
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Which type of selection can favor two extremes when habitats or resources are split?
Which type of selection can favor two extremes when habitats or resources are split?
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Disruptive selection. Different niches favor opposite extremes over intermediate forms.
Disruptive selection. Different niches favor opposite extremes over intermediate forms.
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Which type of selection favors one extreme trait after an environmental shift?
Which type of selection favors one extreme trait after an environmental shift?
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Directional selection. Environmental change makes one extreme more successful than others.
Directional selection. Environmental change makes one extreme more successful than others.
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Which type of selection favors intermediate traits in a stable environment?
Which type of selection favors intermediate traits in a stable environment?
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Stabilizing selection. Extremes are disadvantageous when environment remains constant.
Stabilizing selection. Extremes are disadvantageous when environment remains constant.
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What is a trade-off in traits shaped by environmental conditions?
What is a trade-off in traits shaped by environmental conditions?
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A benefit in one function comes with a cost in another. Energy or resources spent on one trait can't be used for another.
A benefit in one function comes with a cost in another. Energy or resources spent on one trait can't be used for another.
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What is the difference between acclimation and adaptation?
What is the difference between acclimation and adaptation?
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Acclimation is within-life change; adaptation is genetic over generations. Individual adjustment vs. population-level genetic change over time.
Acclimation is within-life change; adaptation is genetic over generations. Individual adjustment vs. population-level genetic change over time.
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What is adaptation in the context of populations over generations?
What is adaptation in the context of populations over generations?
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A heritable trait that becomes common because it improves fitness. Genetic changes spread through populations when they increase survival.
A heritable trait that becomes common because it improves fitness. Genetic changes spread through populations when they increase survival.
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Which type of selection favors both extremes and selects against the average?
Which type of selection favors both extremes and selects against the average?
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disruptive selection. Creates two distinct groups by eliminating middle values.
disruptive selection. Creates two distinct groups by eliminating middle values.
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Which type of selection favors average individuals and reduces extremes?
Which type of selection favors average individuals and reduces extremes?
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stabilizing selection. Maintains population around optimal middle value.
stabilizing selection. Maintains population around optimal middle value.
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Which type of selection favors individuals at one extreme of a trait range?
Which type of selection favors individuals at one extreme of a trait range?
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directional selection. Shifts population toward one end of trait spectrum.
directional selection. Shifts population toward one end of trait spectrum.
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Which option best describes an adaptation: a learned behavior or an inherited trait?
Which option best describes an adaptation: a learned behavior or an inherited trait?
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an inherited trait. Adaptations evolve over generations through genes.
an inherited trait. Adaptations evolve over generations through genes.
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Identify the term for a trait that helps an organism survive in its environment over time.
Identify the term for a trait that helps an organism survive in its environment over time.
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adaptation. Evolved features that increase survival chances.
adaptation. Evolved features that increase survival chances.
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