Across
- 4. a cold-blooded animal that lives both in water and on land during its life
- 6. when one species imitates another to gain protection or other advantages
- 9. a close relationship between species that benefits at least one partner
- 11. a dramatic life-stage change, like a caterpillar becoming a butterfly
- 12. the process of shedding old skin, feathers, or exoskeleton to allow growth
- 13. a survival tactic where an animal's color or pattern helps it blend into its surroundings
- 16. an animal that eats other animals as its main food source
- 19. an organism that provides a home or nutrients for a parasite
- 20. no longer existing anywhere on Earth
- 21. a hard external skeleton that supports and protects some animals
- 22. the specific role or position a species has within its ecosystem
- 23. a prolonged sleep-like state animals use to survive winter scarcity
- 24. an animal with a backbone or spinal column
- 25. a cold-blooded vertebrate that usually has scaly skin and lays eggs
- 26. an animal that is hunted and eaten by predators
- 27. an organism that lives on or in another organism and harms it
Down
- 1. a community of living organisms and their physical environment interacting
- 2. behaviour animals use to attract mates before mating
- 3. an animal that eats both plants and animals
- 5. preserved remains or impressions of ancient organisms in rock
- 7. an animal without a backbone
- 8. a warm-blooded animal that usually has hair and nurses its young
- 10. the ability of some animals to produce light biologically
- 11. seasonal, long-distance movement of animals to find food or breed
- 14. a sequence showing who eats whom in an ecosystem
- 15. active mainly at night rather than during the day
- 17. actions and policies aimed at protecting species and habitats
- 18. an animal that hunts and kills other animals for food
- 19. an animal that feeds primarily on plants
- 20. at serious risk of extinction in the wild