Biology

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Across
  1. 1. particles/a particle smaller than an atom-atom/the basic unit of a chemical element.
  2. 4. biological community of interacting organisms and their physical environment.
  3. 6. molecule containing a very large number of atoms, such as a protein, nucleic acid, or synthetic polymer.
  4. 9. to or derived from living matter.
  5. 10. group of people living in the same place or having a particular characteristic in common.
  6. 11. regions of the surface, atmosphere, and hydrosphere of the earth (or analogous parts of other planets) occupied by living organisms.
  7. 13. action or fact of forming a united whole.
  8. 16. of the distinct types of material of which animals or plants are made, consisting of specialized cells and their products.
  9. 18. to or derived from living matter.
  10. 19. consisting of or deriving from living matter.
  11. 20. individual animal, plant, or single-celled life form.
Down
  1. 1. sweet crystalline substance obtained from various plants, especially sugar cane and sugar beet, consisting essentially of sucrose, and used as a sweetener in food and drink.
  2. 2. action or process of adhering to a surface or object.
  3. 3. a small room in which a prisoner is locked up or in which a monk or nun sleeps.
  4. 5. assets in excess of liabilities; able to pay one's debts.
  5. 7. spoonful of sugar"
  6. 8. group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
  7. 12. substance that has a molecular structure consisting chiefly or entirely of a large number of similar units bonded together, e.g., many synthetic organic materials used as plastics and resins.
  8. 14. molecule that can be bonded to other identical molecules to form a polymer.
  9. 15. chemical substance that neutralizes alkalis, dissolves some metals, and turns litmus red; typically, a corrosive or sour-tasting liquid of this kind.
  10. 17. lowest part or edge of something, especially the part on which it rests or is supported.
  11. 18. part of an organism that is typically self-contained and has a specific vital function, such as the heart or liver in humans.