Natural Selection

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Across
  1. 3. a theory has nearly the opposite meaning. A theory is a well-substantiated explanation of an aspect
  2. 4. the process whereby organisms better adapted to their environment tend to survive and produce more offspring.
  3. 6. the disguising of equipment, and installations by painting or covering them to make them blend in with their surroundings
  4. 7. based on the idea that all species are related and gradually change over time
  5. 8. develop gradually, especially from a simple to a more complex form.
Down
  1. 1. a group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding.
  2. 2. the act or process of changing to better suit a situation
  3. 5. a change or difference in condition, amount, or level, typically with certain limits.