<span>A fossil is something that once was living that has slowly been replaced by minerals so pottery would beconsidered an artifact</span>
B. Ecosystem. By definition, an ecosystem is composed of both its abiotic and biotic factors. A community is the population of living organisms in an ecosystem, and a habitat is the generally abiotic location in which the community lives, so "ecosystem" can also be thought of as the inclusion of a community and habitat together. "Pure culture" would more closely describe a population that you might grow on a Petri dish, for instance.
In alteration of generation means the two forms of life structure interchange as polyp to Medusa or Medusa to polyp
Prokaryotes don't have a nuclear envelope they have no nucleus.