Triops is a genus of small crustaceans in the order Notostraca (tadpole shrimp). Some species are considered living fossils, with a fossil record that reaches back to the late Carboniferous, 300 million years ago.
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).The order of these bases is what determines DNA's instructions, or genetic code.NA 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).
Part I - Components of DNA - DNA is made of three types of compounds. 1 â Phosphate groups which are negatively charged and give DNA molecules a negative charge. 2 â A 5 carbon sugar, deoxyribose (hence the name deoxyribonucleic acid). There are two sugars found in nucleic acids; ribose is found in RNA (ribonucleic acid) and deoxyribose in DNA.