Question

write the numbers next to the ecological levels of organization from smallest to largest. 15. ecosystem 16. population 17. organ 18. cell 19. organism 20. community 21. organ system 22. tissue 23. biosphere

Explanation:

The basic unit of life is the cell. Cells group together to form tissues, tissues form organs, organs form organ - systems, and organ - systems make up an organism. A group of the same organisms is a population, different populations together form a community, a community along with its non - living environment is an ecosystem, and all ecosystems on Earth together make up the biosphere.

Answer:

1. Cell
2. Tissue
3. Organ
4. Organ System
5. Organism
6. Population
7. Community
8. Ecosystem
9. Biosphere