When does dna replication happen?

a. during the g1 phase of the cell cycle
b. during the s phase of the cell cycle
c. during the g2 phase of the cell cycle
d. during the mitotic phase of the cell cycle

What is the next step in muscle contraction after the actin changes shape? (apex)

Draw the structure of dna nucleotide with adenine as nitrogenous base

Scientists discover two populations of mice on either side of a major river. the two populations have almost identical genes but the mice from one side cannot breed with mice from the other. this is most likely because