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There are 13 left-handed and 21 right-handed spirals on the cacti in thephotograph. What is...

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There are 13 left-handed and 21 right-handed spirals on the cacti in thephotograph. What is special about these numbers?A. They are consecutive terms in the Fibonacci sequence.B. The value of the 13th term of the pyramidal sequence is 21.C. The value of the 13th term of the Fibonacci sequence is 21.D. They are consecutive terms in the pyramidal sequence.

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