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History of Life

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