From peaceful lake-dweller to AP Biology victim! The meme shows our friend Tiktaalik (that sassy fish-tetrapod transitional fossil) crawling onto land some 375 million years ago, blissfully unaware it's setting evolution on a path that leads directly to stressed-out students memorizing the mind-numbing Calvin cycle.
If only this pioneering creature knew its descendants would trade the simple life of filter-feeding for cramming photosynthesis equations and enzyme names at 2AM before finals. Talk about regrettable evolutionary decisions! Should've stayed in the water, buddy.