Abundant in the swamps and marshes across south Louisiana, crawfish were a favorite food of early residents. Centuries later, crawfish season in Louisiana is still exciting, with crawfish boils and backyard parties a time-honored tradition. Commercial sales of crawfish in Louisiana began in the late 1800s.
Deoxyribonucleic acid (/diËÉksiËraÉªbÉµ.njuËËkleÉª.É¨k ËaesÉªd/ ; ËÃ¦SÉªD) dna is a molecule that carries most of the genetic instructions used in the, development functioning and reproduction of all known living organisms and many. viruseshe two DNA strands are known as polynucleotides since they are composed of simpler units called nucleotides. Each nucleotide is composed of a nitrogen-containing nucleobase âeither cytosine (C), guanine (G), adenine (A), or thymine (T)âas well as a monosaccharide sugar called deoxyribose and a phosphate group.
What is DNA? â¢ Deoxyribonucleic acid (DNA) is a nucleic acid that contains the genetic instructions used in the development and functioning of all known living organisms. â¢ This chemical substance is present in the nucleus of all cells in most living organisms. â¢ DNA controls: â All the chemical changes which take place in cells. â The kind of cell which is formed, (muscle, blood, nerve etc) is controlled by DNA. â The kind of organism which is produced (buttercup, giraffe, salmon, human etc) is controlled by DNA. DNA Subunits â¢ DNA is a very large molecule made up of a long chain of subunits. â¢ The subunits are called nucleotides . â¢ Each nucleotide is made up of: â a sugar called deoxyribose â a phosphate group -PO 4 and