instruction:
Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.
question:
Question: What component of cells is present in plant and bacterial cells but not animal cells? Answer: cell wall
answer:
Animal Cell. The shape of an animal cell is not constrained by a rigid cell wall. A bacterial cell is shown above for comparison.

question:
Question: How many types of major tissues do modern plants have? Answer: three
answer:
A tissue is a group of specialized cells of the same kind that perform the same function. Modern plants have three major types of tissues. They're called dermal, ground, and vascular tissues.

question:
Question: When matter reacts, there can be what that comes from nowhere and is unaccounted for? Answer: mass
answer:
When matter reacts, there can be mass that comes from nowhere and is unaccounted for.