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