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单词 metameric
例句 metameric
One of a group of metameric hydrocarbons, C5H10, of the ethylene series. Webster's Unabridged Dictionary 2012-03-24T02:00:23.513Z
This circlet of gill-lamellae led Cuvier to class the limpets as Cyclobranchiata, and, by erroneous identification of them with the series of metamerically repeated ctenidia of Chiton, to associate the latter mollusc with the former. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z
In metamerically segmented animals the 322 appearance of the cavities of these sacs is synchronous with, and indeed determines, the appearance of metameric segmentation. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z
Furthermore, in the mid region of the body this coelom is broken up by metamerically arranged septa, as in Acanthobdella. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross"
In the true Chitonidae there are generally two apertures on each side, and in two species three or four, another instance of the tendency to metameric repetition in the group. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 2 "Chicago, University of" to "Chiton"
But as certainly as we have no such metameric segmentation, as this older view implies, in the brain-case of the frog, so quite as certainly is metameric segmentation evident in its branchial arches. Text Book of Biology, Part 1: Vertebrata
As part of the wider idea of the metameric repetition of parts it had some scientific worth, but the theory was pushed too far, and the facts were twisted to suit it. Form and Function A Contribution to the History of Animal Morphology
It is fermentable, nearly as sweet as cane sugar, and is metameric with dextrose. The Gutenberg Webster's Unabridged Dictionary Section I, J, K, and L
The setae are implanted metamerically in accordance with the metamerism of the body, which consists of a prostomium followed by a number of segments. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross"
The gills are thus metamerically repeated; there may be from four to eighty pairs, but there is 249 often a numerical asymmetry on the two sides. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 2 "Chicago, University of" to "Chiton"
The renal organ of the rabbit, some time before birth, displays a metameric arrangement of its parts; but this disappears, as development proceeds, into the compact kidney of the adult. Text Book of Biology, Part 1: Vertebrata
In other respects Sedgwick's speculations link on more closely to the Gastræa theory, for one of his main contentions is that the blastopore or Urmund is homologous throughout at least the three metameric phyla. Form and Function A Contribution to the History of Animal Morphology
It is important to notice that the metameric plan of growth of Chaetopods is still preserved. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross"
The internal organs are largely repeated metamerically, in correspondence with the external metamerism. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross"
Coelom generally reduced to a system of tubes, sometimes communicating with vascular system; in Acanthobdella and Ozobranchus a series of metamerically arranged chambers as in Oligochaeta. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross"
If the student wants a perfect figure of metameric segmentation he should think of a train of precisely similar carriages, or a string of beads. Text Book of Biology, Part 1: Vertebrata
It is consciously and admittedly an attempt to apply Geoffroy's principle of the unity of plan and composition to the three great metameric groups, the Annelida, Arthropoda, and Vertebrata. Form and Function A Contribution to the History of Animal Morphology
But the metameric segmentation in the rabbit's organism is not nearly so marked as that of an earthworm, for instance, which is visibly a chain of rings. Text Book of Biology, Part 1: Vertebrata
Commonly the nephridia are strictly paired a single pair to each segment, while the branches of the blood vascular system are similarly metameric. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross"
It is possible to have bilateral symmetry without a metameric arrangement of parts, as in the mussel and the cuttle-fish; but metameric segmentation without complete or reduced bilateral symmetry does not occur. Text Book of Biology, Part 1: Vertebrata
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