Biology help; what shows only a cell wall?
Here's the list of choices: Soil, Flower, Snake, Cork, Soda Can, Wood, and Human.
I *think* cork and wood are to be boxed - though like I've said, I'm not sure. I remember cork being related to a bunch of prison cells when it's put under a microscope, though for wood, I assume because it was previously living? I also don't know if the wood is meant to yet be alive, or if that would then be called bark instead.
Either way, please help my confused freshman brain. Thanks in advance!