Which of the following sentences is the correct conjugation:
- A breadth of organisms depends on water.
- A breadth of organisms depend on water.
I believe the subject of the sentence is singular, "a breadth," in which case option 1 would seem to be correct. However, whenever I say this sentence out loud it just sounds wrong. Further, one could compare these two sentences to the nearly identical "many organisms depend on water," or "a lot of organisms depend on water," where the plural form of the verb is clearly the correct choice.