Several biology students have just returned from a field trip in which they were asked to collect prokaryotes and eukaryotes
The eukaryotic organisms were to be divided into plant cells, animal cells, or "other." The students have access to a light and electron microscope. Can you suggest how they could determine whether these cells are prokaryotic or eukaryotic? How could they distinguish plant from animal cells?
What will be an ideal response?
Answer: The students should list various criteria that distinguish prokaryotes from eukaryotes. These include differences in size and structure and the presence or absence of nuclei and organelles. Both plants and animals are multicellular. Plants can be distinguished from animals by the presence of a cell wall, chloroplasts, and a central vacuole. Animals possess lysosomes and centrioles and have no cell wall. "Others" (fungi and protists) would not necessarily fit these criteria.
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