Synergy What is an Organism? (Topic C)

Stem cells

Cells that are undifferentiated

Multicellular

Describes an organism made of many cells

Unicellular

Describes organisms formed of only one cell

biochemistry

study of chemistry in living organisms

kingdom

the largest group in the Linnaean system.

mitosis

the specific part of the cell cycle where the cell divides to make two new cells which are identical

Classification

Sorting into groups

Evolutionary tree

A method used to show how closely related organisms are.

Three- domain system

A modern model of classification based on differences between organisms

Chromosomes

A structure containing one molecule of DNA

Embryo

A very young multicellular organism formed by fertilisation

Eukaryota

All organisms with a nucleus, like us, plants, fungi and protists

Differentiation

The process of becoming a specialised cell

Cell cycle

The series of stages during which cells divide to make new cells

Archaea

Unicellular, like bacteria, but biochemically very different. These organisms often live in extreme environments

Bacteria

a prokaryotic organism