Which of the following does not describe the structure of DNA?
double helix
o nucleotide polymer
contains adenine guanine pairs
sugar-phosphate backbone

If someone could do the first couple, just so i can see how it's done that would be great! 20 points. complete a dichotomous key for the 10 leaves on the common leaves sheet. the chart provided here allows for 11 pairs of statements. depending on how you build your dichotomous key, you may or may not need all of them, or you may need to add some.

Casts and mold are a type of preservation where the original material decays, leaving a mold in surrounding rock that can be filled with another sediment a. true b. false

Which is a kingdom? protistachordataprokarya mammalia