Recent content by NgNg

Because myxozoans appear to be the ONLY metazoans to have completely lost their mitochondria, and to have completely lost the genes involved in the synthesis of mitochondria. Therefore they are the ONLY metazoans to have completely lost their ability to aerobically respire.

"Protista" and "Protoctista" are no longer considered to be valid taxa for just this reason.

Not quite. From the abstract of the PNAS article: "Using deep sequencing approaches, we discovered that a member of the Cnidaria, the myxozoan Henneguya salminicola, has no mitochondrial genome, and thus has lost the ability to perform aerobic cellular respiration. This indicates that these...

No. Biologists define Metazoans (animals) as members of a clade of multicellular heterotrophs. From a strictly evolutionary (or phylogenetic) perspective, Metazoans are all the organisms whose most recent common ancestor is at the base (or origin) of the Metazoan clade. This excludes Fungi, who...

1) Myxozoans have been known for quite some time (the taxonomic Class was erected in the 1970s), and it has been known since they were first discovered that they have no mitochondria. Therefore, it has been known since soon after they were first discovered that they are obligate anaerobes. This...

Someone needs to take a freshman Biology course. Cellular respiration and "breathing" are NOT the same thing.