DNA structure. DNA is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group and a nitrogen base. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C).
Answer:B. Fossils
Explanation:
fossils is the remains or impression of a prehistoric plant or animal embedded in rock and preserved in petrified form. it has nothing to do with continental drift.
I just had this answer but it hasn't been graded. I put 1. Meteor impacts, 2. volcanic gases and 5. Milankovitch cycles. I didn't put earthquakes because I wouldn't think it would affect the climate changing since they just affect ground movement.
a eukaryotic organism that cannot be classified as an animal, plant, or fungus
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Cysteine -> cystathionine
