Answer:
See the answer below, please.
Explanation:
DNA is made up of nucleotides, which are composed of: phosphate group, sugar (deoxyribose) and nitrogenous base (adenine, cytosine, guanine or thymine). These nucleotides join together to form a double spiral-type chain (the double helix). In the base matings by hydrogen bonds: adenine pairs with thymine, and guanine with cytosine (this is inside the double helix and the sugar-phosphate skeleton on the outside).
Answer:
When using a microscope, generally magnification is higher and a ruler will not work unless you are using a very low power stereo microscope. When using a compound high power microscope an eyepiece reticle is used to make measurements.
Explanation:
what is the variable factor !
