question: Hydrostatic skeletons are a feature of some what?
choices.text: unicellular organisms aquatic animals chondrocytes eukaryotic cells angiosperm trees and flowers prokaryotic cells Microscopic vessels.
choices.label: A B C D E F G H
fact2: Cnidarians have a hydrostatic skeleton.
combinedfact: Some aquatic animals have hydrostatic skeletons.
formatted_question: Hydrostatic skeletons are a feature of some what? (A) unicellular organisms (B) aquatic animals (C) chondrocytes (D) eukaryotic cells (E) angiosperm (F) trees and flowers (G) prokaryotic cells (H) Microscopic vessels.