SciencePsychology16.3 Darwin Presents His Case Worksheet
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16.3 Darwin Presents His Case Worksheet

Jayda Brown avatar Jayda Brown
20 October 2023
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Struggle for existence is the way members of all species compete for food, and space to live.
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What does the phrase struggle for existence mean?
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Camouflage is considered an adaptation because it helps the species survive in their environment
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Why is camouflage considered an adaptation?
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Fitness is how well the animal can thrive in their environement. If an animal has higher fitness, they survive better.
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How does an animal's level of fitness relate to its chances of survival and reproduction?
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inherited
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Natural selection acts on (acquired) traits
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TRUE
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Any inherited characteristic that increases an organism's chance of survival is considered an adaptation
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Fitness
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(Natural selection) is the ability if an individual to survive and reproduce in its specific environment
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reproduce
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Natural selection depends on the ability of organisms to ______, which means to leave descendents.
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descended
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Every organism alive today ______ from ancestors who survived and reproduced.
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evolve
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Over many generations, adaptation could cause successful species to ______ into new species.
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related
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Common descent suggests that all species, living and extinct, are ______.
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descent with modification
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The principle that living species descend, with changes, from other species over time is referred to as ______.
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fossil record
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The ______ provides physical evidence of descent with modification over long periods of time.