The figure above represents an experimental test of Lack’s H…
The figure above represents an experimental test of Lack’s Hypothesis. The dark line represents the number of young that survived when eggs were added to bird nests. The gold histogram represents the clutch sizes normally observed in the same population of birds. In both years of this experiment resources were abundant and were not seen to be a cause of the difference between clutch size. Explain why we see this difference between the observed clutch size and the number of offspring birds can actually raise in a given season?