Answer:
DNA is double-stranded, while RNA is single-stranded. RNA contains ribose as a sugar, while DNA contains deoxyribose. Also, three of the nitrogenous bases are the same in the two types (adenine, cytosine, and guanine), but DNA contains thymine while RNA contains uracil.
About 11 to 15 days after conception the zygote attach to the uterine wall
Answer:
The real breakthrough in understanding DNA, however, came with the discovery of its structure in 1953. The discovery of the structure of DNA is often credited to James Watson and Francis Crick.
Explanation:
