Given the Darrow-Yannet Diagram below, which answer would co…

Given the Darrow-Yannet Diagram below, which answer would correctly describe what occurs between the ICF and ECF when a HYPOtonic distilled-water solution is administered to a patient intravenously? (HINT: Remember that osmolarity/concentration is on the Y-axis and volume is on the x-axis in these diagrams)

When rodent populations become large and dense, a lot of fig…

When rodent populations become large and dense, a lot of fighting occurs.  (A) Some people have claimed that this is because in dense populations, individuals encounter many non-relatives.  Aggression is favored in these encounters with “strangers” as opposed to encountering kin and offspring in which cooperative behavior would be favored.  (B) Others have criticized this argument on the grounds that aggression in dense populations stems from the fact that individuals lack familiarity with those animals that they meet, not from any supposed reproductive advantage of being aggressive to non-relatives.  Define each of these explanations as either ultimate or proximate (make sure to explain your choice).  Is one explanation more correct than the other one?  In other words, should the two groups be arguing with each other?  Why or why not?