Gaz respiratoire (en mL) Dioxygène Dioxyde de carbone 100 mL d'air entrant 21 0,03 b Composition en O, et en CC entrant et sortant des poumo 100 ml d'e sortant 16,2 4,3 le l'air un lapin

many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

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explanation:

a- all cells come from pre-existing cells

the most common type of reef is the fringing reef. this type of reef grows seaward directly from the shore. they form borders along the shoreline and surrounding islands.