Answer:
The correct answer is "9 cycles".
Explanation:
The minimum number of cycles necessary to replicate a fragment of DNA over 500 times is 9 cycles. In Polymerase Chain Reaction (PCR) method, the fragments of DNA are doubled in each cycle. This means that after "n" cycles, the total number of fragments is given by the equation 2^n. In this case, after 9 cycles a total of 512 DNA fragments will be obtained, because 2^9 is equal to 512.
Answer
150 metres
Explanation
The plate moves at a rate of 3cm/year
In 5000 years, the plate would have moved:
3cm • 5000 = 15000 cm
Convert from cm to m (100cm = 1m)
15000 / 100 = 150
Answer is therefore 150 metres
Plants produce oxygen during photosynthesis