81 because each person has 9 people to greet and there’s 9 people so 9x9=81
Answer:
Stroma, in botany, refers to the colorless fluid surrounding the grana within the chloroplast. Within the stroma are grana (stacks of thylakoid), and the sub-organelles or daughter cells, where photosynthesis is commenced before the chemical changes are completed in the stroma. Photosynthesis occurs in two stages.
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Answer:
90 mins i think. Sorry if wrong im not sure
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