For each scientist listed below, explain how they contributed to the cell theory. Contribution to Cell Theory Scientist 1. Robert Hooke 2. Matthias Schleiden 3. Theodor Schwann 4. Rudolf Virchow

Select all the correct answers. for a claim about the natural world to be considered scientific, what attributes must it have? a). it must be open to modification if new evidence doesn't completely support it. b). it must be based on scientific observations that can be repeated in a controlled setting. c). it must be applicable to future events and occurrences. d). it must be consistent with only a small portion of relevant observations or data.