The surface of a tree has a harder "feel" than does the surface of a dog. What cell characteristic of each organism can be used to explain this differnece?

What do you think? Why don't you show us the answers you have come up with. We are here to help you, not do it for you.

Sounds like the teacher might be trying to get students to mention the cell wall of plants? (Of course, animals don't have a cell wall.) But that's really wrong, since lots of animal parts are hard--bones, fingernails, the plates of an armadillo or tortoise. Likewise, many plants have a soft fuzzy surface. I can't imagine what CELL characters question is alluding to...
JustAsking

Oh my God
But I will try explain it to you
What you feel when u touch the surface of the tree is its bark and worn out hard surface ,you are not touching its cells at that time, the cell of its outer surface have lost their water and softer content.while the surface of the Dog is its skin and hair made of hair cells not bark as the tree.

Common sense yar!