Structures, Functions, and adaptations of plants and animals

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Across
  1. 1. the oxygen breathing part of water animals
  2. 7. A robin building a nest out of sticks and dry grass is an example of behavioral ____________________.
  3. 9. the female / ovule producing part of a flower
  4. 11. leaves, roots, and stem are _________ structures of a plant
  5. 12. A(n) ______________________ is a hard skeleton on the outside of some animals that gives structure and protection.
  6. 13. a decrease in animal population is often because of a reduction in the amount of _________ in an area
Down
  1. 2. pollen producing male part of a flower
  2. 3. bring oxygen to a an animals body
  3. 4. The advantage of plant ___________________ spreading over a wide area is they may have less competition for resources.
  4. 5. a change in a gene
  5. 6. the major function of a flower
  6. 8. an internal structure of a flower which makes eggs for plant seeds
  7. 10. what part of a plant is effected if the plant can't move water?