Final answer:
Between 1% and 11% of the world's species may be threatened by extinction every decade. There is no specific information provided for the number of species disappearing per year, but estimates suggest a high extinction rate.
Step-by-step explanation:
According to the information provided, between 1% and 11% of the world's species may be threatened by extinction every decade. This means that between 0.1% and 1.1% of the world's organisms are threatened or endangered per year.
As for the estimated number of species disappearing per year, there is no specific information provided in the reference. However, the 2016 Living Planet Report from the World Wildlife Federation claimed that global populations of animals fell by 58% between 1970 and 2012, and extrapolated the loss by 2020 to 67%. E.O. Wilson's estimate of the current extinction rate is three species per hour.