Before meiosis begins, chromosomes duplicate, making chromosomes that have sister chromatids. which step is this?
a. prophase
b. telophase
c. interphase
d. metaphase

One function of the poly-a tail on eukaryotic mrna sequences is to the mrna be transported from the nucleus to the cytoplasm. prokaryotic mrna also has a poly-a tail. choose the best explanation of the prokaryotic poly-a tail. a. prokaryotic poly-a tails have the same functions as eukaryotic poly-a tails, because this process is highly conserved throughout different species. b. prokaryotic poly-a tails aren't important, because prokaryotes don't have nuclei. c. prokaryotic poly-a tails have other functions, because prokaryotes don't have nuclei. d. prokaryotic poly-a tails are composed of a different molecular structure compared with eukaryotic poly-a tails.

Of seawater increases with decrease in the temperature. therefore, the cold water sinks to the deeper layers at the bottom

The diagram shows the layers of earth. convection currents in which region influence the movement of tectonic plates