Just check if it has all the characteristics of life.
1. Is it made of cells?
2. Does it metabolize?
3. Does it keep internal conditions stable? (Homeostasis)
4. Does it have organs?
5. Can it reproduce?
6. Does it grow/develope?
7. And does it respond to stimuli (poke a bug, it moves. flower grows towards the sun.)
If all of these are Yes, your specimen is in fact, living.
Answer:
Prokaryotes are organisms that consist of a single prokaryotic cell. Eukaryotic cells are found in plants, animals, fungi, and protists. They range from 10–100 μm in diameter, and their DNA is contained within a membrane-bound nucleus. Eukaryotes are organisms containing eukaryotic cells.
Explanation:
Lichens use chemicals to break down rocks, which will turn into soil.
To keep track of water levels and to help predict possible floods.