Domain in which cells are prokaryotic, separate from bacteria.
Single-celled microorganisms which can exist independent organisms
All the parts of the planet that are inhabited by living things; sum of all Earth's ecosystems.
Basic unit of living matter; separated from its environment by a plasma membrane.
A group of organisms with common characteristics, attributes, qualities or traits.
The systematic arrangement of similar entities on the basis of certain differing characteristics and the basis of their relationships.
Organism that obtains food by eating producers (autotrophs) or other consumers.
The number and variety of species present in an area and their spatial distribution.
Molecule responsible for inheritance; nucleic acid that contains the sugar deoxyribose.
Broadest category used to classify life forms.
Community of living things plus the nonliving features of the environment that support them.
The capacity for work.
The external conditions, resources, stimuli etc. with which an organism interacts.
The domain comprised of eukaryotes or organisms whose cells contain a true nucleus.
Cell with a nucleus (surrounded by its own membrane) and other internal organelles.
Generation-to-generation change in the proportion of different inherited genes in a population that account for all of the changes that have transformed life over an immense time.
Organisms belonging to the same family evolved from the same ancestors and share relatively common characteristics.
Unit of inherited information in DNA.
A taxonomic category ranking used in biological classification that is below a family and above a species level, and includes group(s) of species that are structurally similar or phylogenetically related.
Internal stability or "steady state" maintained by the body.
A taxonomic rank that is composed of smaller groups called phyla (or divisions, in plants).
Consisting of many cells.
A taxonomic rank used in classifying organisms, generally below the class, and comprised of families sharing a set of similar nature or character.
Process by which plants use the sun's energy to convert water and carbon dioxide into sugars.
A group of Classes with similar distinctive characteristics.
Group of individuals of the same species living in a particular area at the same time.
Organism that makes its own food (autotroph) and produces organic molecules that serve as food for other organisms in its ecosystem.
Cell lacking a nucleus and most other organelles.
The adaption of form or behaviour of an organism to changed conditions.
The production of offspring by organised bodies.
A distinct form of life.
Complex organization formed from a simpler combination of parts.
Consisting of a single cell.