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Evolution and Natural Selection Crossword Puzzle for Middle School is a hard crossword puzzle with 20 clues covering . Play it online for free below, or create your own crossword with our free crossword maker.

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Evolution and Natural Selection Crossword Puzzle for Middle School
Challenge your understanding of evolution and natural selection with this hard-level crossword puzzle. Perfect for grades 6-8, it covers advanced terms like speciation, alleles, and more.
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Across
  • 1. Branch of biology that studies heredity and variation
  • 2. All the genetic information in a breeding population
  • 3. Continued existence through adaptation in a changing environment
  • 5. The variety of life forms in an ecosystem or on Earth
  • 9. Movement of individuals that can alter allele frequencies in a population
  • 10. Differences in traits among individuals within a species
  • 13. A group of interbreeding individuals of the same species
  • 16. The observable physical or biochemical characteristics of an organism
  • 18. Different versions of the same gene found at a specific locus
Down
  • 4. Type of selection that favors organisms best suited to their environment
  • 6. The process through which remains of organisms are preserved in rock
  • 7. Type of isolation preventing species from interbreeding
  • 8. The process of generating mutations in DNA
  • 11. Structures derived from a common ancestor but with different functions
  • 12. Theory that species evolve by natural selection, proposed by Charles Darwin
  • 14. A heritable trait that increases an organism's chance of survival
  • 15. An organism’s ability to survive and reproduce in its environment
  • 17. Type of evolutionary pattern marked by long stability interrupted by rapid change
  • 19. Formation of new and distinct species through evolution
  • 20. Process by which certain traits become more common because they aid survival
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