Volcanic eruptions that occur as a result of continental shifting are typically found where
the crust is thickened and the tectonic plates converge.
the crust is thinned and the tectonic plates diverge.
the crust diverges and the tectonic plates submerge.
the crust emerges and the tectonic plates converge.

Explain the importance of producers, primary consumers, secondary consumers and decomposers in an ecosystem.

Match the following terms describing electrical events with the correct phases of the cardiac cycle. the ventricular muscle cells depolarize at the start of this phase. during this phase, na+ entry through the funny channels causes the pacemaker potential of sa nodal cells to gradually become less negative until it reaches threshold. the ventricular muscle cells repolarize right before this phase. the cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase. a. isovolumetric relaxation b. ventricular ejection c. isovolumetric contraction d. ventricular filling

If bacteria are much too small to see, what is one reason why can we see colonies in the petri dishes that have plenty of food to eat after only a few days?