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Thinking Scientifically
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  1. All life forms are believed to have evolved first in the ocean. What made water a better nursery for the evolution of new lineages?
  2. A farmer sprays a field of soybeans with pesticide to kill an insect that has been eating his crop. Later in the season his plants are tall, but there are very few soybeans on the plants. What hypothesis could explain the connection between these two observations?

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