It is known that females, which in some species outnumber males 100 to one, produce small numbers of surprisingly large, yolky eggs 2 to 7 cm in diameter depending on the species. There is no larval stage. Characteristics of Class Myxini Body slender, eel-like, rounded, with naked skin...
Macroevolution, defined broadly as evolution above the species level, has two primary components: the origin of variation and the sorting of variation. The latter component is driven by the differential origin and persistence of genealogical units (in the macroevolutionary sphere, species and clades o...