Here are some other terms that might be used depending on the context:
* Specimen: This term is often used for a sample of an organism, such as a plant leaf or a blood sample.
* Model organism: This is a specific organism chosen for study because it is easy to work with, has a well-characterized genome, or shares important characteristics with other organisms. Examples include mice, fruit flies, and bacteria.
* Experimental unit: This term is used in experimental design to refer to the smallest unit to which a treatment is applied. In some cases, this could be an individual organism, but it could also be a group of organisms or even a part of an organism.
Ultimately, the specific term used will depend on the nature of the research and the specific scientific discipline involved.
