bio </3

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Across
  1. 1. zone area where two closely related species continue to interact and reproduce,
  2. 5. formation of a new species
  3. 7. genetic differences among individuals in a population
  4. 9. continued speciation divergence between two related species due to low fitness of hybrids between them
  5. 10. polyploidy formed between two related, but separate species
Down
  1. 2. allopatric speciation that occurs when a few members of a species move to a new geographical area
  2. 3. speciation when one species radiates to form several other species
  3. 4. group of the same animals
  4. 6. heritable trait or behavior in an organism
  5. 8. reproduction of individuals with favorable genetic traits that survive environmental change because of those traits, leading to evolutionary change