Some types of dinoflagellates (single-cell eukaryotes) show a circadian rhythm. They produce light for about 12 hours in the dark (at night) and photosynthesize for about 12 hours in the light (during the day)
Say you took some dinoflagellates at the end of their 12 hours of
darkness and put them on a 24-hour light cycle. How would the cells likely respond during
the first day of that cycle?
A. The cells would photosynthesize for the full
24 hours.
B. The cells would photosynthesize for more
than 12 hours but less than the full 24 hours.
C. The cells would produce light for the full 24
hours.
D. The cells would not produce light or
photosynthesize.
B
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