Types of organisms

Eukaryotic cells

Contain a nucleus and other organelles that are bound by membranes.

Prokaryotic cells

Does not contain a nucleus or other membrane-bound organelles

DNA in eukaryotes

Stored in nucles

DNA in prokaryotes

Suspended in cytoplasm an chromosomal DNA and circular loops called plasmids

Size of eukaryotes

10-100 micrometers, larger than prokaryotes

Size of prokaryotes

1-10 micrometers, smaller than eukaryotes

Common structures in eukaryotes + prokaryotes

Cytoplasm, cell Membrane, ribosome and genetic information

How many domains are there?

3: Bacteria, Archaea and Eukarya

How many kingdoms are there?

6 (2 prokaryotes, 4 eukaryotes)

Cell theory

All living things are composed of cells, cells are the basic units of structure and function in organisms, and new cells are produced from existing cells

MRSGREN

Movement, Respiration, Sensation, Growth, Reproduction, Excretion, Nutrition

Organism

A living thing (has MRSGREN characteristics)

Example of uni. prokaryotic organism

E. coli (bacteria, unicellular)

Example of mult. eukaryotic organism

Human (animalia, multicellular)

Example of col. eukaryotic organism

Volvox (protista, colonial)

Eukaryotic or prokaryotic?

Eukaryotic, as it contains membrane bound organelles (generalised animal cell)

Eukaryotic or prokaryotic?

Prokaryotic, as it has no membrane bound organelles, yet contains cytoplasm and genetic information (generalised bacteria)

Eukaryotic or prokaryotic?

Prokaryotic, as it has no membrane bound organelles, yet contains cytoplasm and genetic information (thermophile archae)

Binary fission

Form of asexual reproduction in single-celled organisms (Pro + Euk) by which one cell divides into two cells