In science, "alive" refers to organisms that perform specific vital functions. While there is no single perfect definition, biologists generally agree on seven key characteristics that distinguish living things from non-living matter:
: All living things are composed of one or more cells, which contain DNA and organized structures. In science, "alive" refers to organisms that perform
: The capacity to produce offspring, either sexually or asexually, to ensure the continuation of the species. either sexually or asexually