PLANTS AND THEIR SURROUNDINGS

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Across
  1. 2. (n.) a general line along which someone or something grows or moves
  2. 9. (adv.) toward a lower place or position
  3. 12. (n.) the part of a plant that holds the plant in place and absorbs water and minerals
  4. 14. (n.) the place and conditions around something
  5. 15. (n.) the part of a new plant that is just starting to grow up from the ground
Down
  1. 1. (v.) to act in response to something
  2. 3. (n.) a gas that has no color or smell, is present in air, and is necessary for most animals and plants to live
  3. 4. (v.) to grow or do well
  4. 5. (n.) something in the environment that causes a living thing to respond
  5. 6. (n.) the force that pulls objects toward the center of Earth
  6. 7. (adv.) toward a higher place or position
  7. 8. (n.) the reaction of a plant to a stimulus
  8. 10. (v.) to take action as a result of something that has happened or been done
  9. 11. (n.) a thing, place, or activity that you get something from
  10. 13. (n.) the pointed end of something