The medium in which the wave travels
Answer:
D
Explanation:
The German doctor Rudolf Virchow proposed that all cells result from the division of previously existing cells, and this idea became a key piece of modern cell theory.
This results from cytokinesis when he observes cells splitting into two.
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Answer:
Why would a plant cell have a chloroplast while an animal cell wouldn't? Chloroplasts are used to make food through photosynthesis. Plant cells make their own food, while animals do not.
Ribozymes. Hope this helps