Science

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Across
  1. 2. A physical trait
  2. 8. Reproduction A type of reproduction that requires two parents
  3. 10. It produces gametes
  4. 11. Groups of tissue together
  5. 12. Two of the same alleles
  6. 13. Over When cells combine DNA
  7. 14. Something limiting a person's ability to do something
Down
  1. 1. Materials made for humans
  2. 3. What plants use to make food and oxygen
  3. 4. Square A system used to determine an organism's traits
  4. 5. Cycle The exchange of carbon between the environment and living things
  5. 6. The least complex system
  6. 7. Fuels Fuels that are made from the remains of prehistoric animals and plants
  7. 9. Respiration Respiration that requires oxygen
  8. 15. A trait from a parent