Chapter 28- protists

Protists are…

Eukaryotic

Protists

any eukaryotic organism that is not an animal, a land plant, or a fungus

Protist life cycles

combine asexual reproduction, sexual reproduction

4 groups of protists

Excavata, SAR, Archaeplastida, and Unikota

Excavata

Feeding groove on one side with three monophyletic groups- diplomonads, parabasalids, and englenozoa

SAR

Highly diverse and made up of three major clads- Stramenophiles, Alveolates, and Rhizarians

Stramenophiles (SAR)

can photosynthesize, have hairy flagellum. Examples: diatoms, golden algae, seaweed.

Alveolates (SAR)

Have membrane-bound sacs called alveoli. Examples: Dinoflagellates, Apicomplexans, and Ciliates

Rhizarians (SAR)

Move using pseudopodia. Example: amoebas

Archaeplastida

Primarily photosynthetic. Example: red algae and green algae.

Unikonta

Closely related to animals and plants. Example: slime molds, tubulinids, and entamoebas

Symbiotic protists

provide food to corals, help termites digest, can cause human diseases