Mr. Purewal, Thanks for the fantastic explanation. The incorrect usage of which/each of which/each one of which can be clearly used to eliminate wrong options choices, but I think for Non native speakers like me - The meaning issue - I mean this part will not come naturally -
RonPurewal Wrote:(a) and (b) have the wrong meaning: the placement of the "when"/"whenever" clause suggests that the teeth are only there when another tooth is lost or worn down.
You have done a 100% correct POST MORTEM of this problem with medical precision, but I have one doubt left Mr. Purewal in Option E -
E. In the shark's jaws, many spare teeth lie in seemingly limitless reserve,
each one ready to slide into the appropriate position whenever an active tooth is lost or worn down.
Logically "each one(teeth)" refers to the teeth, but grammatically isn't it creating ambiguity? I mean grammatically can't each one refer to reserve, and, thus creating ambiguity?
I have one more subtle doubt - when refers to time frame, but whenever how is it used?
MY UNDERSTANDING OF WHENEVER =
I believe WHENEVER is used when there are multiple TIME instances that are possible - all instances are either true or false.
WHENEVER I give GMAT I score 700+ = ALWAYS TRUE situation in all the possible time instances.
WHENEVER I apply to Wharton, I face rejection = ALWAYS FALSE situation in all the possible time instances.
WHEREAS -
When refers to one time instance, Right?