Element (20X) in the periodic table exist in:

This large tectonic plate is bounded on three sides by whats know as the ring of fire. what is the name of this tectonic plate? a) pacific plate b) eurasian plate c) north american plate d) indo- australian plate plz it's science but there's no option for science so i picked chemistry

Is this a single replacement reaction or there is no

1) these are barrel shaped microtubules in most animal cells, that organize the spindles during cell division