Habit and Intelligence in Their Connexion with the Laws of Matter and Force; A Series of Scientific Essays Volume 1

Habit and Intelligence in Their Connexion with the Laws of Matter and Force; A Series of Scientific Essays Volume 1

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1869 edition. Excerpt: ...plants, and live on their juices.2 (o not. decompose If then vegetables have motor actions like animals, and if carbonic there are whole tribes of vegetables which, like animals, do not acid decompose carbonic acid, and if the lowest classes of animals jeaf" have no muscles nor nerves, what is the distinction between the tinction kingdoms 1 I reply, that I do not believe there is any absolute bies and certain distinction whatever. and ani mals. 1 A possible exception to this is mentioned in note 2, p. 85. 2 Carpenter's Comparative Physiology, p. 732. It is to be observed, however, that the copper beech, and other plants with leaves that are not green, decompose carbonic acid in the usual way. NOTE B. FORMATIVE AND MOTOR FUNCTIONS. I Do not know that it ought to be said that there is no gradation Actions between the formative and the motor functions. The ForamiinForami-nifera, and some other Ebizopods, put forth projections of the once for-sarcode substance of the body, called pseudopodia, which are, at mative and as o function, temporary tentacles. May not these be truly homologous with the permanent tentacles of the Hydrozoa? If so, the putting forth and retraction of the pseudopodia, which are manifestly motor actions, are also to be classed as formative, forming the transition from the formative to the motor functions. What supports this conjecture is the fact, that in gromia the pseudopodia are only formed at one end, but in amoeba they are formed on any part of the surface of the body; just as in hydra the tentacles all form a ring round the mouth, but in some of the compound Hydrozoa there are tentacles on various parts. Dr. Wyville Thomson appears to share this view. He says: "I am strongly inclined to regard cilia as locomotive...show more

Product details

  • Paperback | 132 pages
  • 189 x 246 x 7mm | 249g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • Illustrations, black and white
  • 1236499247
  • 9781236499240