Natural History Crossword

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Across
  1. 2. Man's best friend's ancestor (4)
  2. 6. Largest animal to ever live (4,5)
  3. 7. Fifth planet from the sun (7)
  4. 9. Hairy elephant (7)
  5. 13. Bottom of the food chain, SpongeBob antagonist (8)
  6. 15. They can be golden,white-tailed, and bald (6)
  7. 17. Fertile spot in desert, Britpop band (5)
  8. 18. A young frog or toad (7)
  9. 19. Not moss, but can be likened to it (6)
  10. 20. Hose hypnotists (anagram)- plant's nutrient mechanism (14)
  11. 21. They can be tawny, snowy, and little (4)
Down
  1. 1. Screeching bird of Summer, fast (5)
  2. 3. Wet wood (10)
  3. 4. Itchy jumper (4)
  4. 5. Fawkes' primate namesake (3,3,7)
  5. 8. Acorn producer (3,4)
  6. 10. The powerhouse of the cell (12)
  7. 11. Insect with antlers (4,6)
  8. 12. Continent with more penguins than people (10)
  9. 14. Girl's best friend's base element (6)
  10. 16. Slow-moving branch hugger with long nails (5)