Sobre o citoesqueleto, sabemos que três são os principais filamentos associados a ele, os microtúbulos, os filamentos de actina e os filamentos intermediários, Estes filamentos variam em quantidade e distribuição conforme o tipo celular. KAMEI, M. C. S. L.​​ Biologia e Bioquímica Humana. Maringá: Unicesumar, 2018. Sobre estes três filamentos principais, assinale a alternativa correta:

In terms of alternation of generations, the internal parts of the pollen grains of seed-producing plants are most similar to a ) moss sporophyteb) moss gametophyte bearing both male and female gametangiac) fern sporophyted) fern gametophyte bearing only antheridia

The sketch shows a rynchosaur, an extinct animal that is known only from fossils. there has been much debate about the classification of these creatures. some scientists suggest that they belong with primitive amphibians, and some think they are related to snakes and lizards.the data equally support both cases. which statement best explains how to draw a cladogram that includes the rynchosaur? draw the cladogram for amphibians. draw the cladogram for reptiles. draw two cladograms, both showing the traits, and leave it as a hypothesis. draw two cladograms, both showing the traits, and have scientists vote

Polar zones are cold and tend to be dry because of a pressure system of cold. low high