Your answer should be tissues.
Answer:
true
Explanation:
Coal is a non-renewable energy source because it takes millions of years to form.
Matthias Jacob Schleiden was a German botanist who, with Theodor Schwann, cofounded the cell theory. In 1838 Schleiden defined the cell as the basic unit of plant structure, and a year later Schwann defined the cell as the basic unit of animal structure.
