invertabrates

3. Symmetry around a central point, commonly seen in organisms like cnidarians and echinoderms
5. Alteration or elimination of natural habitats, often due to human activities.
7. Organisms that obtain food by filtering particles from the water, as seen in sponges.
11. Benefits provided by ecosystems to humans, such as water purification and polination
12. Respiratory organs in aquatic organisms that extract oxygen from water.
13. The variety of life within a specific ecosystem or habitat.
15. Vascular System: Unique hydraulic system in echinoderms for movement, feeding, and respiration

1. Specialized stinging cells found in cnidarians, used for defense and capturing prey.
2. A taxonomic rank in biological classification, grouping organisms based on characteristics
4. Animals lacking a backbone or vertebral column.
6. Reproduction without the involvement of gametes, resulting in offspring genetically identical to the parent
8. The preservation and sustainable management of natural resources and biodiversity.
9. Describes organisms that are permanently attached to a substrate and do not move.
10. External hard covering, typically made of chitin, providing support and protection, common in arthropods
14. A phylum of marine invertebrates including starfish, sea urchins, and sea cucumbers