In multicellular organisms, reproduction involves the production of offspring that share characteristics with their parents. This typically refers to sexual reproduction, but asexual means are also employed.

Fungi reproduce and spread efficiently through the production of millions of asexual spores.

Lower organisms such as yeast and hydra exhibit reproduction through a process called budding.

Planaria, also known as flatworms, demonstrate true regeneration, where a fragmented organism can regrow lost body parts to become a new, complete organism.

Filamentous algae, moss protonema, and fungi can readily multiply through fragmentation, where a piece of the organism develops into a new individual.

For unicellular organisms like bacteria, algae, and Amoeba, reproduction is closely linked with growth, specifically an increase in the number of cells.

In single-celled organisms, the distinction between growth (increase in cell number or mass) and reproduction can be unclear.

Certain organisms, such as mules, sterile worker bees, and infertile human couples, are incapable of reproduction, indicating it's not a universal defining characteristic of life.

A key distinction is that non-living objects lack the inherent ability to reproduce or replicate themselves.