Kingdom (?) Protista(ch. 25)

Use your notes chart to summarize info and list examples.

You only need to know the phyla and specific examples in your chart and lab.

Kingdom (?) ProtistaGeneral CharacteristicsMost diverse kingdom, contains

organisms that cannot be classified in other kingdoms

Eukaryotes with little or no cell specialization

Trophism - Hetero- or autotrophic

Kingdom ProtistaGeneral CharacteristicsGrowth pattern – unicellular (most), colonial, or

multi-cellular / filamentous

Kingdom ProtistaGeneral CharacteristicsHabitat – watery environments: aquatic

(freshwater or marine), terrestrial (moist), host or vector (parasitic)

Kingdom ProtistaGeneral CharacteristicsReproduction

Asexual: many use binary fission, some use multiple fission (more than two offspring produced); fragmentation & regeneration

Binary fission video in Euglena – Utube

Binary fission video – Paramecium - UTube

Kingdom ProtistaGeneral CharacteristicsReproduction

Sexual – many use conjugation (four genetically different offspring produced)

Paramecium conjugation exchange of micronuclei

conjugation tubes

Zygotes develop into thick walled, resistant zygospores.

Alternation of Generations – Multicellular Algae *Draw this on your notes! *

* Mitosis used in every step except formation of spores.

*

Kingdom ProtistaEvolutionSimilarities to bacteria suggest evolution from

prokaryotes through endosymbiosis or in-foldingResemble the likely ancestors of animals, plants, and

fungi, which are multicellular and have a higher degree of cell specialization (many tissues & organs)

Kingdom Protista - Classification

Three large categories/sub-kingdoms based mainly on trophism: animal-likeplant-likefungus-like

Photosynthetic ProtistsSymbioses with

Cnidarians

Some anemones, corals, and jellyfish have symbiotic algae (zooxanthellae )