If earth didnt rotate what would be one major obsticale life would have to uvercome?

If Earth didn't rotate, one major obstacle for life would be the extreme temperature differences between day and night. Without rotation, the side facing the sun would become exceedingly hot, while the opposite side would plunge into frigid darkness. This would create inhospitable environments, making it difficult for ecosystems to thrive and for organisms to adapt to such drastic temperature variations. Additionally, the lack of a day-night cycle would disrupt biological rhythms and processes essential for life.