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History of Life

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Across
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THE PROCESS OF WHICH DIFFERENT KINDS OF ORGANISMS ARE THOUGHT TO DEVELOP
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Surviving and having offspring
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Cased by Major climate changes due to an asteroid or a volcanic eruption
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THE CHANGING OF A STRUCTURE OF A GENE
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A GROUP OF ORGANISMS OF ONE SPECIES THAT BREED AND LIVE IN THE SA ME AREA
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Who recieves the Good genes?
Down
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Another way to describe natural selection
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Caused by low variation and the inability to adapt.
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THE THEORY THAT ORGANISMS ADAPT TO THEIR SPECIFIC ENVIRONMENT
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Shared by 2 related species
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THE FORMATION OF NEW AND DISTINCT SPECIES
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Any genetic differences between individuals of the same species
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Get food, get shelter, don't get eaten
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What type of isolation often makes new species?
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Weak, sick and unhealthy