Nucleotides are the monomers that make up the polymer of dna. what can be known about the process of building a dna molecule? it involves building carbon-hydrogen covalent bonds by accepting electrons. it involves breaking carbon-carbon ionic bonds by donating electrons. it involves building carbon-carbon covalent bonds by sharing electrons. it involves breaking carbon-hydrogen ionic bonds by removing electrons.

It involves building carbon-carbon covalent bonds by sharing electrons.

Explanation:

Nucleotides form the basic structural unit by nucleic acids like DNA and they are also the basic building blocks for DNA and RNA. The process of building a DNA involves carbon-carbon covalent bonds by sharing electrons. A DNA molecule is composed of two strands and a series of three nucleotides within the DNA is known as a Codon. The reason C is the answer is because a carbon can form four covalent bonds and it involves the sharing of two electrons. In a covalent bond, two atoms share a pair of electrons.

even though you have attached neither the chart nor the generalizations, i have located them online. the right answer is d, since they are asking you about a generalization. you can only infer from the chart that between 2008 and 2009 the number of employed workers decreased significantly (from over 115 millions to 107 millions approximately), which signals some type of economic crisis.