Answer:
DNA or RNA
Explanation:
<em>Nucleotides are typically made up of phosphate group, nitrogenous bases and pentose sugars. They represent the building blocks of nucleic acids.</em>
<em>The nitogenous bases are of two types - purine and pyrimidine. Purine consists of adenine and guanine while pyrimidine consists of cytosine and thymine/uracil. </em>
<em>Both DNA and RNA consist of cytosine, adenine and guanine. However, thymine is only present in DNA and replaced by uracil in RNA.</em>
Hence, the cytosine could have come from either of DNA or RNA.
Answer:
Meiosis occurs in reproductive cells, as the goal is to create haploid gametes that will be used in fertilization
The answer is C, because it has a negative charge -1. All groups with charges called ions, unless they are organic compounds.
A) is false as condoms aren't designed to be used twice and it increases the risk of your partner getting pregnant
