The data graphed in Figure 29.3 could be an artifact if latrunculin A kills this species of diatoms (i.e.,that may be why the cells are not moving).Which of the following would be the best evidence that latrunculin A is not killing the cells?
A)When the toxin was washed off the culture,the cells began to move again.
B)There were still a small percentage of motile cells in the culture treated with the toxin.
C)Most of the cells in the control were moving,indicating that they were alive.
D)When the toxin was applied to another species of diatom,25% of them continued to move.

Question

Quizplus · Accepted Answer

If washing off the toxin from the culture allows the cells to move again, it indicates that the cells were not killed by the toxin but rather their movement was inhibited temporarily. This would provide evidence that latrunculin A is not killing the cells. Option B suggests that there were still some cells moving, but it is not clear if they were the same cells as before treatment or if they were a different, unaffected population. Option C is not relevant in determining if the toxin is killing the cells. Option D only indicates that another species of diatom may not be affected by the toxin, but it does not provide evidence about the species in question.

The Data Graphed in Figure 29