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.
A phobia is an intense fear of something that, in reality, poses little or no actual danger. Common phobias and fears include closed-in places, heights, highway driving, flying insects, snakes, and needles. However, you can develop phobias of virtually anything.
OR
A Phobia is an irrational fear of something that's unlikely to cause harm. The word itself comes from the Greek word“phobos,” which means “fear” or “horror.” Hydrophobia, for example, literally translates to fear of water. When someone has a phobia, they experience intense fear of a certain object or situation.
I just took the test & the answer is 100% the 2nd paragraph , please mark me the brainlyest so I can answer more of your questions 100% correctly
The very first microscope was made by Robert Hooke and was a simple looking microscope. It has been many years since then and technology has evolved more and more. Modern microscopes can see things so small they’re invisible to the human eye.
The study of cells will have evolved as well, with scientists discovering something new everyday that will go in future textbooks for future generations to learn.
The impact of the modern day microscope has helped so much with the study of cells.
