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21 Cards in this Set
- Front
- Back
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Trace remains of organisms that lived long ago are called what?
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fossils
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What does speciation create?
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a new species
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What can two different species have in common?
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ancestors
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What did Charles Darwin help to explain?
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how species change over time
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What did not help Darwin create his theory?
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knowledge of genetics
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What helps an organism survive in its environment?
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adaptation
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What is a trait?
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a genetically determined characteristic
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Which of the following is NOT a result of natural seclection?
a. horses that are bred to be faster b. insects that are able to resist insecticides c. bacteria that survive antibiotics d. elephants that are born without tusks |
The answer is A. horses that are bred to be faster
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Sometimes part of a population moves away from the rest. What is this called?
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separation
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What is it called when separated groups of a population cannot mate with each other?
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division
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What do scientists think was an ancestor of whales?
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an ancient land mammal
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The best adapted offspring live and reproduce. What is this called?
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successful reproduction
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What is it called when organisms face disease, hunger, and predators?
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struggle to survive
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What is it called when parents have too many offspring?
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overpopulation
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What is it called when all offspring are different from each other?
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inherited variation
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Mating animals so their offspring will inherit desired traits is called?
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selective breeding
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Slow changes in population over time are known as?
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evolution
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A group that can mate and have fertile offspring is a(n)
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species
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The time between one generation of offspring and the next is?
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generation time
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Members of a species who live in the same place are a(n)?
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population
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The history of life shown by remains of once-living organisms is the?
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fossil record
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