Organisms that grow, feed, and shelter on other organisms are known as _____________.

Organisms that grow, feed, and shelter on other organisms are termed parasites. This classification highlights the relationship these organisms have with their hosts, where the parasite benefits at the expense of the host, often causing harm or stress. Parasites can take various forms, including worms, protozoa, and certain bacteria, and they rely on living hosts for their survival and reproduction.

In contrast, commensals are organisms that live on or within a host without causing harm, often benefiting from the relationship while the host remains unaffected. Symbionts engage in mutualistic relationships where both parties benefit, enhancing their survival and well-being. Autotrophs are organisms that produce their own food, typically through photosynthesis, and do not depend on other organisms for sustenance. Understanding these definitions is crucial in cosmetology and related fields, where knowledge of microbial interactions can impact hygiene practices and client safety.