Tiger beetles are such fast runners that they can capture virtually any nonflying insect. However, when running toward an insect, the beetles intermittently stop, and then, a moment later, resume their attack. Perhaps they cannot maintain their pace and must pause for a moment's rest; but an alternative hypothesis is that while running tiger beetles are unable to process the resulting rapidly changing visual information, and so quickly go blind and stop.

Tiger beetles stop intermittently in between while running.
1st theory : They stop because they become tired.
2nd Theory: While running tiger beetles are unable to process resulting rapidly changing information and go blind and stop.



Which of the following, if discovered in experiments using artificially moved prey insects, would support one of the two hypotheses and undermine the other?


A When a prey insect is moved directly toward a beetle that has been chasing it, the beetle immediately turns and runs away without its usual intermittent stopping.
They won't stop... This guy undermines both the theories. Both theories say they stop because X and because Y. A says they never stop. --- OUT

B In pursuing a moving insect, the beetles usually respond immediately to changes in the insect's direction, and pause equally frequently whether the chase is up or down an incline.
They immediately respond to insects change in direction. - So they can process the information quickly cool. - Theory 2 is failing
They pause equally frequently whether the chase is up or down an incline- what the fish... So It is not because they become tired ? When running down the cliff they expend less energy so they should stop in NON-EQUAL intervals when compared to when they climb up. - So it is not because they become tired. - Theory 1 is failing - JUST last phrase kicks the option OUT. We need to read the whole option from now on..

C The beetles maintain a fixed time interval between pauses, although when an insect that had been stationary begins to flee, the beetle increases its speed after its next pause.
Fixed time interval between pauses - OK nice they become tired at regular intervals when running. - Supporting Theory 1
Although when the insect that had been stationary begins to flee. - Wow they maintain fixed pauses even when the insect changes its direction and movement - Now It undermines Theory 2.

ANSWER

D If, when a beetle pauses, it has not gained on the insect it is pursuing, the beetle generally ends its pursuit.
wow nothing... It supports neither theory 1 nor theory 2 ... OUT

E When an obstacle is suddenly introduced just in front of running beetles, the beetles sometimes stop immediately, but they never respond by running around the barrier.
SOMETIMES..... not a good one.. OUT