Which of the following is a nucleotide found in dna? select one: a. deoxyribose +phosphate group + cytosine b. cytosine +phosphate group + guanine c. deoxyribose +phosphate group + polymerase d. adenine + phosphate group +thymine

What's the waste product of electrons and pyruvate combining in fermentation?  

Ivan is looking at a cross section of a stem taken from a vascular plant. he sees two different types of vascular tissue: the xylem, which is closer to the center of the stem, and the phloem, located around the xylem, closer to the outside of the stem. how do these two structures work together in a living plant?

If a checkpoint detects damaged dna, the checkpoint may