Invertebrate

4. Animals lacking a backbone or vertebral column.
8. in arthropods.
11. Organisms that primarily feed on other animals.
13. Destruction: Alteration or elimination of natural habitats, often due to human activities.
16. Services: Benefits provided by ecosystems to humans, such as water purification and
17. Organisms that primarily feed on plants.
18. Respiratory organs in aquatic organisms that extract oxygen from water.
20. and clams.
22. Shell: Protective structure typically composed of calcium carbonate, found in mollusks like

1. Division of an organism's body into repeating structures or segments.18. Ecosystem: A biological community of interacting organisms and their physical environment.
2. Symmetry: Symmetry around a central point, commonly seen in organisms like cnidarians and
3. Vascular System: Unique hydraulic system in echinoderms for movement, feeding, and
5. External hard covering, typically made of chitin, providing support and protection,
6. The variety of life within a specific ecosystem or habitat.
7. The preservation and sustainable management of natural resources and biodiversity.
9. Specialized stinging cells found in cnidarians, used for defense and capturing prey.
10. A phylum of marine invertebrates including starfish, sea urchins, and sea
12. Feeder: Organisms that obtain food by filtering particles from the water, as seen in sponges.
14. A taxonomic rank in biological classification, grouping organisms based on shared
15. identical to the parent.
19. Describes organisms that are permanently attached to a substrate and do not move.
21. Reproduction: Reproduction without the involvement of gametes, resulting in offspring