The correct answer is <span>D. They break down dead organisms</span>
Answer:
Gravity is never equal to zero because the force of gravity will always exist, but could just be really small. In other words it depend on the weight of gravity but it will never equal zero.
Explanation:
In 1869, Friedrich Miescher isolated "nuclein," DNA with associated proteins, from cell nuclei. He was the first to identify DNA as a distinct molecule. Phoebus Levene was an organic chemist in the early 1900's. He is perhaps best known for his incorrect tetranucleotide hypothesis of DNA.
To sum it up the answer is yes.