week 4 words

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Across
  1. 5. The study of plants
  2. 6. the branch of biology that deals with the relations of organisms to one another and to their physical surroundings.
  3. 7. to write correctly
  4. 8. a book about someone's life
Down
  1. 1. the variety of life in the world or in a particular habitat or ecosystem.
  2. 2. Does it itself
  3. 3. a book about yourself
  4. 4. The study of animals