Obtains energy and nutrients by feeding on other organisms
Eukaryotic consumers that secrete substances to break down food externally, then absorb nutrients, most are multicellular
A group of single celled organism that lack a nucleus but are more closely related to eukaryotes than to bacteria
Organ _____ are organs that interact closely in some task
Is an individual that consists of one or more cells
Process in which an organism keeps its internal conditions within tolerable ranges by sensing and responding to change
A group of species that share a unique set of traits
Carries hereditary information that guides development of other activities
Simplest eukaryotes, but as a group they vary dramatically, from single-celled consumers to giant, multicelled producers
Multicelled eukaryotes, and the vast majority of them are photosynthetic producers that live on land
A structural unit that is composed of two or more tissues and adapted to carry out a particular task
The process by which individuals produce offspring
A community interacting with its physical and chemical environment
Organisms whose cells characteristically have a nucleus
Increases in cell number, size, and volume
Encompasses all region of Earth's crust, waters, and atmosphere in which organisms live
The most diverse and well-known group of single-celled organisms that lack a nucleus
A group of organisms that share a unique set of traits