The strucure of dna is actually in a double helix arrangment. Double helix means that the two long chains of nucleotides are arranged in a spiral like a twisted ladder. The sides of the ladder are made up of alternating blank and blank molecules. The steps of the ladder are made of blank blank held together by hydrogen bonds.

a. seed plant structure. 1. the three main plant organs are roots, stems, and leaves. a fourth kind of tissue, meristematic tissue, is responsible for plant growth. meristematic tissue is the only plant tissue that produces new cells by mitosis. plants can lose water out of their leaves as they exchange gases with the air

explanation:

to figure the total magnification of an image that you are viewing through the microscope is really quite simple. to get the total magnification take the power of the objective (4x, 10x, 40x) and multiply by the power of the eyepiece, (usually 10x)