In the section "Investigating Life: Genetic Messages from Ancient Ecosystems",why did the scientists choose to look for the gene encoding for rubisco protein in their core samples?
A) Plant cells do not have mitochondriA.
B) Plant cells do not have a nucleus.
C) It is used in respiration by all plants.
D) It is used in photosynthesis by all plants.
E) It is present only in angiosperms.
Correct Answer:
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