Animal/Plant/Environmental Science

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Across
  1. 3. a species endangered when the total number of remaining members may not be sufficient to produce enough offspring to ensure survival of the species
  2. 4. any species of plant or animal that occurs naturally in an area, not introduced by humans
  3. 9. the protection, improvement, and wise use of natural resources by humans for present and future generations
  4. 13. plants or animals that are not native to an area and which establish themselves and overcome or outcompete pre-existing native species
  5. 16. the category of animals that feed on both plants and animals
  6. 17. a plant that lives for two years of growing seasons - producing leaves the first season and flowers and seeds the second
  7. 18. the beginning of plant growth from a seed
  8. 20. a broad term that includes non-domesticated animals but not inclusively mammals, birds, reptiles, and amphibians
Down
  1. 1. a plant that has leaves year-round
  2. 2. a male sheep
  3. 5. a female sheep
  4. 6. a mix of organic and synthetic materials spread on or worked into soil to increase its capacity to support plant growth
  5. 7. decomposed plant material that adds nutrients to the soil and improves soil composition
  6. 8. a female horse
  7. 9. the green coloring matter in plants - essential to photosynthesis
  8. 10. the geographic area in which a species occurs
  9. 11. the category of animals that feed on plants
  10. 12. the category of animals that prey or feed upon animals and insects
  11. 14. a plant that completes its growth cycle in one season
  12. 15. a male horse
  13. 19. a dynamic complex of plants, animals, and other organisms along with their non-living environment, interacting as a functional unit