What foundational structure has four carbon rings?

Which element is found in both dna and proteins

Where would you expect to see seedless plants, such as ferns and mosses? a. in a botanical museum, because they are all extinct b. low and close to the ground in a moist environment c. climbing high while circling the branches of another plant d. deeply rooted in a forest with a trunk that reaches 20 meters or more

If you have a difficult time knowing where your hand is without looking at it you may be having a problem with your what ?