science

4. Eubacteria: "True" bacteria; prokaryotic, unicellular organisms, often with peptidoglycan walls.
5. Archaebacteria: Single-celled prokaryotes, distinct from bacteria, often inhabiting extreme environments.
7. Non-living, acellular particle needing a host cell for reproduction.
9. Photosynthetic, eukaryotic protists, ranging from unicellular to multicellular types.
10. A close, long-term interaction between two different biological species
11. Protista: Diverse, mostly unicellular eukaryotic organisms (algae, protozoa, slime molds).
13. Fission: Asexual reproduction where one bacterium splits into two clones.
15. Asexual reproduction method in organisms where a body breaks into pieces.

1. Symbiotic organism combining fungi and algae (or cyanobacteria).
2. Small, floating aquatic organisms that are vital for food chains.
3. Unicellular, eukaryotic, heterotrophic protists often capable of independent movement.
6. Bacterial reproduction involving the direct transfer of DNA between cells.
8. : Unicellular, prokaryotic microorganisms lacking a nucleus, common in many habitats.
12. Branching filament structures that make up the body of fungi.
14. Fungi: Eukaryotic, heterotrophic organisms with chitin cell walls, including molds, yeasts.