What type of transport takes place when a protein allows an ion to enter a cell but no energy is needed to make this happen

The movement of tectonic plates in two different locations is shown below: two blocks labeled location a and location b are shown. at location a the top layer of the block shows two horizontal arrows pointing towards each other. small dunes are shown in the middle between the two arrows. the block labeled b has a vertical line in the middle. on the left of the line there is an arrow pointing down. on the right of the vertical line there is an arrow pointing up which statement is most likely true? subduction may occur in both locations. earthquakes may occur in both locations. subduction may occur in location a only and a volcanic eruption may occur in location b only. an earthquake may occur in location a only and a volcanic eruption may occur in location b only.

How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?

2. sketch the inside of the bean nodule, and describe or label what you observed with the hand lens.