Hooke named cells after looking at cork…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
Hooke named cells after looking at cork. Yet the cells he saw were dead.
- What exactly did Hooke see?
- Who first saw a living cell, and how?
- Why did the first cell theory need Virchow's idea?
Need a reminder? The key ideaShow
The cell theory: Schleiden (plants, 1838) and Schwann (animals, 1839) said that living things are made of cells; Virchow (1855) added that every cell comes from a cell. Hooke named cells, Leeuwenhoek first saw live cells and Brown found the nucleus. Image width equals real width times the magnification; 1000 µm make 1 mm.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. (a) Hooke saw the walls of dead plant cells, which looked like tiny empty boxes.
Step 2. (b) Leeuwenhoek saw live cells, through the fine lenses he made.
Step 3. (c) The first theory did not explain how new cells form. Virchow showed that cells come from existing cells by division.
Answer: (a) empty cell walls; (b) Leeuwenhoek, with his lenses; (c) to explain where new cells come from.
Discussion (0)
Log in to join the discussion.
Loading…