In the section "Investigating Life: Solar-Powered Sea Slugs",chloroplast DNA encodes less than 10% of the proteins required for photosynthesis;the remaining proteins are encoded by DNA in plant nuclei.Elysia chlorotica sea slugs are able to photosynthesize with chloroplasts from the algae they consume.Which hypothesis was tested and supported in explanation of this observation?
A) Some sea slug genes were present in chloroplast chromosomes.
B) Chloroplasts can function without some proteins involved in photosynthesis.
C) The sea slugs have to continuously consume chloroplasts to replace the older ones.
D) Some chloroplast genes were present in the sea slug chromosomes.
E) Only photosystem II is necessary for photosynthesis.
Correct Answer:
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