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Hard Evolution and Natural Selection Crossword Puzzle for Middle School is a hard crossword puzzle with 9 clues covering . Play it online for free below, or create your own crossword with our free crossword maker.

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Hard Evolution and Natural Selection Crossword Puzzle for Middle School
Challenge yourself with this hard-level biology crossword focused on evolution and natural selection. Perfect for grades 6-8 exploring advanced concepts and terminology in evolutionary biology.
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Across
  • 2. Observable physical or biochemical characteristics of an organism
  • 3. Group of organisms capable of interbreeding and producing fertile offspring
  • 6. Differences in traits among individuals within a population
  • 8. Measure of an organism’s ability to survive and leave offspring
Down
  • 1. Trait that enhances an organism’s survival and reproduction in its environment
  • 4. Genetic makeup of an organism at a specific set of genes
  • 5. Type of pressure that favors certain traits over others
  • 7. One of two or more versions of a gene found at the same locus
  • 9. Random change in DNA sequence that can create genetic variation
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