In an experiment, a culture of Euglena is placed in a petri dish, and a piece of cardboard with a circle cut
out of its center is placed over the petri dish, allowing light to enter only the center of the petri dish.
After 30 minutes, the cardboard is removed, and the culture is observed.
WWhich of the following BEST describes the appearance of the Euglena culture after the 30 minutes?
A) The petri dish has a uniform light green color, indicating the Euglena
Culture have spread out across the dish.
B.) The petri dish has a concentrated dark green area where the circle was,
indicating that the Euglena culture moved toward the light source. C.) The Petri dish has a concentrated light green area where the circle was, indicating that the euglena culture was moved away from the light source D.) The Petri dish has a dark green ring around the perimeter of the Petri dish, indicating that the euglena culture moved to the edges where the light was the strongest