biology 9

Single-celled prokaryotic organisms that can be found in a

variety of environment

bacteria

a tiny, infectious particle that can only reproduce by inserting

genetic material into a host cell.

virus

groups of organisms that are classified together based on

common ancestry.

clads

the highest and broadest taxonomic rank used to classify living

organisms.

domains

a theory that explains how eukaryotic cells may have originated from prokaryotic cells when one cell engulfed another.

Endosymbiosis

the process of arranging organisms into groups based ontheir shared characteristics.

classification

branch of biology that deals with grouping and naming organisms based on their physical similarities

taxonomy

a branching tree diagram that shows the ancestral relationships among organisms

Cladogram

the representation of the evolutionary history and relationships between groups of organisms.

Phylogeny:

the most specific unit of classification in taxonomy that represents a group of organisms made of similar individuals capable of reproducing

species