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Biology

QuestionAnswer
how old is the earth? 5 billion years old
life began? 4 billion years ago
when did multi-cellular life begin? 3 billion years after life began
When did complex life begin? 1/2 billion years ago In the Oceans (Cambrian Geologic period)
When did land vertebrates appear? 425 million years ago
when did mammals appear? 230 million years ago
when did primates appear? 50 million years ago
What did Stanley Miller find in his "early earth experiment" ? Amino Acids the building blocks of life
Chloroplasts use sun's energy to synthesize carbon compounds oxygen is a by product
mitochondria use oxygen to make energy
what does evolution mean? unfolding descent with modification
natural selection -variation in population -overproduction -adaptive -offspring best adapted will reproduce
genetic drift some evolutionary changes occur by chance
Created by: zkline
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