Dcbio Protist Chart PDF

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Summary

TMHS Putnam...

Description

Domain Eukarya Protist Characteristics of Protist: Protist are the simplest, but most diverse, of the eukaryotes. Most are unicellular, but some exist as colonies cells or are multicellular. General Characteristics: Metabolism Photoautotrophic

Synthesize organic compounds via photosynthesis

Heterotrophic

Some ingest food by endocytosis. Some are parasitic.

Mixotrophic

Combine autotrophic and heterotrophic nutritional modes Cell Characteristics: Reproduction

Asexual reproduction (occurs under normal environmental conditions)

Process: By mitosis

Sexual reproduction (occurs when environmental conditions are unfavorable)

Process: may occur when conditions are unfavorable. Formation of spores allows protists to survive hostile environments. A cyst is a dormant cell with a resistant outer covering which can survive until favorable conditions return. In parasites, a cyst may serve as a means of transfer to a new host Evolution and Diversity of Protists

Protists were once classified together as a single kingdom. DNA evidence suggests that protists are not monophyletic. Protist Diversity “Supergroup”

Members

Distinguishing Features

Archaeplastids

Green algae, red algae, charophytes, plants

Plastids, single-celled, colonial, and multicellular

Examples

Chromalveolates

Stramenophiles: brown algae

Stramenophiles:

Alveolates:

Alveolates:

Members

Distinguishing Features

Excavates

“Supergroup” Amoebozoans

Rhizarians

Examples

Opisthokonts...