Is it true that sexual reproduction is always necessary for the survival and reproduction of a species? 
 

Sexual reproduction is not always necessary for the survival and reproduction of a species. Many species reproduce asexually and have been able to persist for long periods of time without relying on sexual reproduction. Asexual reproduction can provide advantages such as rapid population growth and the absence of the need to find a mate, but it can also lead to reduced genetic diversity and decreased adaptability to changing environments.

A good example of a species that primarily reproduce asexually is the bacterium Escherichia coli, which can divide rapidly and produce many offspring without the need for sexual reproduction.