Video Experimental Relacionado
Updated: Mar 1, 2026
07:33
A Whole Mount In Situ Hybridization Method for the Gastropod Mollusc Lymnaea stagnalis
Published on: March 15, 2016
9.5K
Los aspectos pueden ser engañosos: discordancias en filogenia y morfología dentro de los choanoflagelados lorificados
Alex Gàlvez-Morante1, Florentine U Rutaganira2,3, Brian Palenik4
1Institut de Biologia Evolutiva (CSIC-Universitat Pompeu Fabra) , Barcelona, Spain.
Open biology
|February 27, 2026
Resumen
Nueva investigación sobre choanoflagelados revela que la morfología de la lórica por sí sola es insuficiente para una clasificación precisa. Los datos genéticos son cruciales para las asignaciones taxonómicas a nivel de género en estos holozoos heterótrofos.
Videos de Conceptos Relacionados
01:27Diversity of Protists III
1.4K
Rhizaria are a diverse group of unicellular protists characterized by their threadlike cytoplasmic extensions known as pseudopodia. These structures aid in both locomotion and feeding, giving Rhizaria an amoeboid appearance. Their amoeboid morphology once led to taxonomic confusion, but molecular phylogenetics has clarified their evolutionary placement and emphasized their shared use of pseudopodia despite divergent lineages.This clade comprises diverse lineages such as Chlorarachniophyta,...
1.4K
01:27Diversity of Protists IV
1.4K
Amoebozoa represent a diverse group of terrestrial and aquatic protists that utilize lobe-shaped pseudopodia for locomotion and feeding. This characteristic differentiates them from the Rhizaria, which possess threadlike pseudopodia. The primary classifications within Amoebozoa include gymnamoebas, entamoebas, and the plasmodial and cellular slime molds. Phylogenetic evidence indicates that Amoebozoa diverged from a lineage that ultimately gave rise to fungi and animals.Gymnamoebas and...
1.4K
01:27Diversity of Protists II
1.5K
Alveolates are a group of organisms recognized by the presence of alveoli, which are cytoplasmic sacs located beneath the cell membrane. While their function remains uncertain, alveoli may help regulate water balance by controlling how much water enters and leaves the cell. In dinoflagellates, these structures may serve as armor plates. There are three major types of alveolates: ciliates, which move using cilia; dinoflagellates, which use flagella for movement; and apicomplexans, which are...
1.5K
01:23Phylogeny
63.6K
Phylogeny is concerned with the evolutionary diversification of organisms or groups of organisms. A group of organisms with a name is called a taxon (singular). Taxa (plural) can span different levels of the evolutionary hierarchy. For instance, the group containing all birds is a taxon (comprising the class Aves), and the group of all species of daisies (the genus Bellis) is a taxon. Phylogenies can likewise include just one genus (i.e., depict species relationships) or span an entire kingdom.
63.6K
01:15Diversity of Protists I
1.6K
Excavata is a diverse group of protists that includes both chemoorganotrophic and phototrophic species, with some thriving in anaerobic environments. Among the key groups within Excavata are diplomonads and parabasalids, which are flagellated protists that lack mitochondria and chloroplasts. These microorganisms typically inhabit anoxic environments, such as the intestines of animals, where they exist either symbiotically or as parasites, relying on fermentation for energy production. Some...
1.6K
02:40The Tree of Life - Bacteria, Archaea, Eukaryotes
40.4K
The “tree of life” describes the evolution of life and the evolutionary relationships between organisms. The root of the tree is the common ancestor to all life on Earth. All other species radiate from this point, much like the branches of a tree. The numerous tips of these branches on the tree of life represent every living, or extant, species. Extinct species, which are species that no longer exist, can be found towards the center of the tree. Currently, these organisms, both...
40.4K