Across
- 1. Phylum of ribbon worms with elongated, flexible bodies.
- 3. Parasite that lives on the external surface of its host organism.
- 4. Possessing both male and female reproductive organs in the same individual.
- 7. Protective structure produced by some annelids and leeches for egg deposition.
- 8. A form of asexual reproduction where eggs develop without fertilization.
- 9. A method of asexual reproduction where an organism splits into two or more individuals.
- 10. Internal partitions separating segments in the body of annelids.
- 11. Organism that feeds on dead and decaying organic matter.
- 13. Tiny hair-like structures used for locomotion in flatworms.
- 16. Relationship A close, long-term relationship between two different species, often mutually beneficial.
- 17. The ability of an organism to regrow lost body parts.
- 18. Having separate sexes in a population.
Down
- 1. Phylum of roundworms, with a cylindrical body and a tough cuticle.
- 2. Reproductive organs that produce gametes (sperm and eggs).
- 5. Phylum of segmented worms, including oligochaetes, polychaetes, and leeches.
- 6. Contractions Wave-like muscular contractions used for movement, often seen in nemerteans.
- 8. Relationship where one organism (parasite) benefits at the expense of another (host).
- 12. The disturbance of sediments by living organisms, important in nutrient cycling.
- 14. Phylum of flatworms, including free-living and parasitic species.
- 15. Elongated feeding structure, often seen in nemerteans for capturing prey.