Place a drop of methylene blue stain on it. Repeat steps d-f from celery skin directions. Label the following structures if present on your drawings. Plants have thick cell walls to strengthen the plant stem. Animals have thin membranes because they have other forms of skeletons.
Plants have cell membranes just underneath their cell walls.
Plants have green colored structures that produce food by photosynthesis. Describe the general shape of onion or celery epidermal cells. Explain why you usually found the onion or celery cell nucleus at the edge rather than in the center of the cell.