It's hard to tell but whatever organ it is maybe it has already diminished it's capacity to function properly due to aging which is the cause of a "natural death".
When a death occurs
It would be an organ, since they serve a purpose. In this case the roots extract water from the soil.
skull
No, in the Organ Donation case study named "Go Ahead and Cut Him," motivation does not matter.
A second plan in case your first plan fails
long-term creditors
a single blind study or a case study?
it would be an good idea. Just in case that job fails.
Case gets thrown out.
A spore case is an organ which contains spores (reproductive bodies like in ferns).
Its not usually a case of denial. Its a case of need, and shortage.
Rich people pay to get cloned in case one of their organs gets cancer or another disease and fails. you can take literally your same organ in the clone and put it in you to keep you alive. The clone dies though, but that's ok. just make another one!