28. bacteria and fungi.
29. answer 3
30. answer 2
Answer:
observation or experience
Explanation:
Empirical method is a study that uses indirect or direct observations in order to gain some knowledge. It uses empirical evidences-information that are collected through observation or experience.
Theory that is tested by empirical method involves the use of objective, that is observed, highly controlled and replicable.
I'm not sure if this is exactly correct, but to complete photosynthesis, plants need carbon dioxide and water. Usually sunlight as well. If you are supposed to be specific, you could put H2O. I hope I answered your question!
I think it's A. They have a cell membrane.
Hope this helps!
