Final answer:
The disappearance of viruses would likely cause a complex impact on life, potentially leading to a gradual decline in microbial populations and improved conditions for humans, but with unforeseen and possibly substantial ecological consequences.
Step-by-step explanation:
The speculative question regarding the sudden disappearance of viruses from Earth poses a complex scenario. If viruses were to vanish, it could potentially lead to a gradual decline in microbial populations, given viruses' role in controlling bacterial populations and genetic exchange. However, it also might result in improved conditions for humans temporarily, by reducing the number of diseases caused by viruses. Yet, the complete removal of viruses could have unforeseen ecological consequences, potentially disrupting existing biological systems and equilibrium. It's important to note that viruses play intrinsic roles in ecosystems and global biogeochemical cycles. Hence, though it might seem beneficial at a glance, the ecological consequences could lead to a complex impact on life.