ascidian

How To Use ascidian In A Sentence

• Cloney has provided a clear description of the types of organs in ascidians.
• Boulders are infested with black tree corals, mussels, cowrie shells, soft and hard corals and ascidians.
• Boulders are infested with black tree corals, mussels, cowrie shells, soft and hard corals and ascidians.
• Aided by currents, the Haven has attracted all the filter-feeding creatures such as crinoids and ascidians, and there are plenty of holes to be occupied.
• Notochords are the axial skeleton of invertebrate chordates (cephalochordates, appendicularians, and tadpole larvae of ascidians), of agnathan fish, and of amphibian tadpoles.
• Huxley shewed that it possessed all the characteristic features of the Ascidians, the same arrangement of organs, the same kind of nervous system, a respiratory chamber formed from the fore part of the alimentary canal, and a peculiar organ running along the pharynx which Huxley called the endostyle and which is one of the most striking peculiarities of the whole group. Thomas Henry Huxley; A Sketch Of His Life And Work
• There exist, doubtless, homologies of great atavistic importance -- I consider as such, for example, the formation of the cavity of Rusconi [the archenteron] in Ascidians and lower Form and Function A Contribution to the History of Animal Morphology
• Over the last two decades, various members of the Coeloscleritophora have been compared to sponges, annelids, mollusks, ascidians, and brachiopods, and the group is likely polyphyletic as other authors have suggested.
• Supposing this primitive stock to have {140} arisen directly from a very lowly organized animal indeed (such as a nematoid worm, or an ascidian, or a jelly-fish), yet it is not easy to believe that less than two thousand million years would be required for the totality of animal development by no other means than minute, fortuitous, occasional, and intermitting variations in all conceivable directions. On the Genesis of Species
• The main interest of the question of course lies in its bearing on the long-disputed relations between plants and animals; for, since neither locomotion nor irritability is peculiar to animals; since many insectivorous plants habitually digest solid food; since cellulose, that most characteristic of vegetable products, is practically identical with the tunicin of Ascidians, it becomes of the greatest interest to know whether the chlorophyl of animals preserves its ordinary vegetable function of effecting or aiding the decomposition of carbonic anhydride and the synthetic production of starch. Scientific American Supplement, No. 324, March 18, 1882