Elodea cells contain a rigid

Question

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that prevents the cell from changing shape due to osmosis and a
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, which is the location where
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occurs in eukaryotes.

Answer 1

Elodea cells contain a rigid cell wall that prevents the cell from changing shape due to osmosis and a nucleus, which is the location where DNA is housed and gene expression occurs in eukaryotes.

You may also select "chloroplast" in place of "nucleus" if you are referring specifically to where photosynthesis occurs in these plant cells, as chloroplasts are the organelles involved in that process.