a cell model os shown student were instructed to review the type and number of structure that are present in this cell model

When does dna replication(make a copy of itself)?

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?

14. which of the following codons code for threonine? a. ucg b. ugu c. cga d. aca