Okay, biology isn't exactly my strongest subject (it never has been), but I'm pretty sure the answer is nucleotides. DNA is made up of nucleotides. Each nucleotide contains a phosphate group, a sugar group, and a nitrogen base. There are four different nitrogen bases: adenine (A), thymine (T), guanine (G), and cytosine (C). A always pairs with T, and G always pairs with C.
Answer:
body
inside your body ........
Answer: Single cell organisms dont need a respiratory system because oxygen and carbon-dioxe diffuses between their body tissues and the enviorment.
Factors that influence the reaction rates of chemical reactions include theconcentration<span> of reactants, </span>temperature<span>, the physical state of reactants and their dispersion, the solvent, and the presence of a catalyst</span>
