Classifying Living Things

Science

The kingdom of multicellular organisms, like humans, lions and insects

Animalia

The kingdom of multicellular organisms, like humans, lions and insects. Animalia. Animalia is a group of living things that move and eat other organisms for energy.

A domain of unicellular prokaryotes with cell walls, they live in extreme environments

Archaea

A domain of unicellular prokaryotes with cell walls, they live in extreme environments. Archaea are simple, single-celled organisms that often thrive in harsh conditions like hot springs or salty lakes.

A domain of unicellular prokaryotes with cell walls

Bacteria

A domain of unicellular prokaryotes with cell walls. Bacteria. Bacteria are tiny living organisms found everywhere, some of which can cause disease while others are beneficial.

The two-word (genus and species) naming system for organisms, like homo sapiens

Binomial nomenclature

The two-word genus and species naming system for organisms, like homo sapiens, is called binomial nomenclature. It is a scientific system used to give every species a unique, standardized name consisting of two terms.

Grouping things by similarity

Classification

Grouping things by similarity. Classification. In science, classification is the process of organizing items or organisms into categories based on shared characteristics.

An aid to identify organisms by answering a series of questions

Dichotomous key

An aid to identify organisms by answering a series of questions. Dichotomous key. A dichotomous key is a tool that helps you identify organisms by guiding you through a series of yes or no questions.

The kingdom of organisms that absorb nutrients from dead matter, like mushrooms or molds

Fungi

The kingdom of organisms that absorb nutrients from dead matter, like mushrooms or molds, is called fungi. Fungi are living organisms that decompose and recycle dead material in nature.

A group made up of similar species

Genus

A group made up of similar species. Genus. In Science, genus is a classification that groups closely related species together.

The plant kingdom, multicellular organisms that are usually green and perform photosynthesis

Plantae

The plant kingdom, multicellular organisms that are usually green and perform photosynthesis. Plantae. Plants are living organisms that use sunlight to make their own food through a process called photosynthesis.

The kingdom of unicellular organisms that have a nucleus, but are not plants, animals, or fungi, like an amoeba

Protista

The kingdom of unicellular organisms that have a nucleus, but are not plants, animals, or fungi, like an amoeba, protista. Protista are mostly single-celled organisms with a nucleus that don't fit into other kingdoms like plants or animals.

A group of similar organisms that can breed and produce fertile offspring

Species

A group of similar organisms that can breed and produce fertile offspring. Species. In simple terms, a species is a group of living things that can have babies together, and their babies can grow up to have their own babies.

Anything that causes an organism to react

Stimulus

Anything that causes an organism to react. Stimulus. A stimulus is something in the environment that triggers a response from an organism.

The scientific classification and naming of organisms

Taxonomy

The scientific classification and naming of organisms. Taxonomy. It is a system used by scientists to organize and name all living things.