A manual of zoologyWilliam Blackwood & Sons, 1878 |
No interior do livro
Resultados 1-5 de 66
Página 13
... allied to , if not absolutely identical with , the hydrated starch of plants . As a general rule , however , it may be stated that the presence in any organism of an external envelope of cellulose raises a strong presumption of its ...
... allied to , if not absolutely identical with , the hydrated starch of plants . As a general rule , however , it may be stated that the presence in any organism of an external envelope of cellulose raises a strong presumption of its ...
Página 15
... allied to the higher plants , but to the lower ; and it is in the very lowest members of the vegetable kingdom , or in the embryonic and im- mature forms of plants little higher in the scale , that we find such a de- cided animal gift ...
... allied to the higher plants , but to the lower ; and it is in the very lowest members of the vegetable kingdom , or in the embryonic and im- mature forms of plants little higher in the scale , that we find such a de- cided animal gift ...
Página 27
... allied species , and when produced they are sterile , and are not capable of reproducing their like . In these cases , therefore , we may take this as a most satisfactory element in the definition of " species . " The sterility ...
... allied species , and when produced they are sterile , and are not capable of reproducing their like . In these cases , therefore , we may take this as a most satisfactory element in the definition of " species . " The sterility ...
Página 33
... allied to the sea - mat , already spoken of , and , like it , can reproduce themselves by continuous gemmation ( forming colonies ) , by a true sexual process , and rarely by fission . In addition to all these methods they can reproduce ...
... allied to the sea - mat , already spoken of , and , like it , can reproduce themselves by continuous gemmation ( forming colonies ) , by a true sexual process , and rarely by fission . In addition to all these methods they can reproduce ...
Página 34
... allied to the preceding ( such as Clytia ) , the process advances a step further . In Clytil the generative buds , or zooids , do not produce the reproductive elements as long as they remain attached to the parent colony ; but they ...
... allied to the preceding ( such as Clytia ) , the process advances a step further . In Clytil the generative buds , or zooids , do not produce the reproductive elements as long as they remain attached to the parent colony ; but they ...
Índice
327 | |
349 | |
363 | |
370 | |
378 | |
386 | |
398 | |
408 | |
141 | |
156 | |
166 | |
180 | |
191 | |
198 | |
206 | |
214 | |
222 | |
231 | |
245 | |
258 | |
268 | |
276 | |
286 | |
295 | |
302 | |
310 | |
425 | |
443 | |
457 | |
469 | |
475 | |
484 | |
510 | |
523 | |
537 | |
549 | |
568 | |
577 | |
590 | |
614 | |
779 | |
782 | |
Outras edições - Ver tudo
Manual of Zoology ...: With a General Introduction on the Principles of Zoology Henry Alleyne Nicholson Pré-visualização indisponível - 2015 |
Palavras e frases frequentes
abdomen adult alimentary canal ambulacral amongst animal Annelides antennæ anus aperture appendages Arachnida articulated attached birds bivalve body bones Brachiopoda branchiæ branchial calcareous carapace cavity cephalothorax chitinous ciliated composed comprising consists contractile Crustacea Ctenophora developed disc distinct division dorsal embryo Eocene external extinct extremity feet females fins fishes Foraminifera fossil furnished gemmation genera genus gills head horny Huxley Hydrozoa incisors Insects integument intestine known labium larva larvæ legs limbs living locomotive males Mammals mandibles margin maxillæ membrane molars Mollusca mouth nervous system operculum organs ovum Owen pairs Paleozoic parasitic placed plates polypide polypites Polyzoa portion possess posterior present regarded reproductive Reptiles resembling respiratory Rotifera rudimentary Scolecida segments shell side Silurian single skeleton sometimes somites species spines stomach structure sub-order surface tail teeth tentacles termed thorax toes transverse tube upper usually valves ventral Vertebrates vesicle whilst wings Zoantharia zooids