Chromalveolata

Definition

Chromalveolata is a major clade of eukaryotic organisms, primarily including certain algae and protists, characterized by the presence of alveoli structures beneath their cell membranes. This group includes important photosynthetic organisms and several pathogenic parasites.

5 Must Know Facts For Your Next Test

1. Chromalveolata includes subgroups such as alveolates (e.g., ciliates, dinoflagellates) and stramenopiles (e.g., diatoms, brown algae).
2. Many members are photosynthetic and play crucial roles in aquatic ecosystems as primary producers.
3. Some Chromalveolata, like Plasmodium species, are significant human pathogens causing diseases such as malaria.
4. The presence of alveoli or membrane-bound sacs beneath the cell membrane is a defining feature of this clade.
5. Chromalveolata was proposed based on molecular phylogenetic studies that revealed shared evolutionary relationships.

Review Questions

Related terms

Alveolate: A subgroup within Chromalveolata characterized by the presence of alveoli under their cell membranes.

Stramenopile: A subgroup within Chromalveolata known for having flagella with hair-like projections.

Plasmodium:

A genus of parasitic protozoa within Chromalveolata responsible for causing malaria in humans.