Direction : match the example to its corresponding level of biological classification. Write the letter that corresponds to the best answer.

Column A
1. circulatory
2. human
3. liver
4. coral reef
5. sperm
6. all organisms in the hydrosphere
7. all rice plants in a rice field
8. connective
9. algae, fish, invertebrates in an ocean
10. leaf
Column B
A. cell
B. tissue
C. organ
D. organ system
E. organism
F. population
G. community
H. ecosystem
I. biosphere​