Dna (deoxyribonucleic acid) is the basic building block of reproduction in living things. a dna chain is a sequence of chemicals called bases. there are four possible bases: thymine (t), cytosine (c), adenine (a), and guanine (g). (a) how many three-element dna chains are possible? dna chains

Afarm is to be built in the shape of quadrilateral abcd, as shown below. all four sides are equal. a rhombus abcd is shown with diagonal ac equal to 15.5 feet and diagonal bd equal to 13.2 feet. what is the area of the farm? pleas only pick from the 4 below 62 square feet 52.8 square feet 57.4 square feet 102.3 square feet