The Study of Animal Life |
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Page 13
... simple to complex , but this will express only our most generalised conceptions . For within each class there is great variety , each has its own masterpieces . Thus the simplest animals are often cased in shells of flint or lime whose ...
... simple to complex , but this will express only our most generalised conceptions . For within each class there is great variety , each has its own masterpieces . Thus the simplest animals are often cased in shells of flint or lime whose ...
Page 19
... simple sub- stances , at a low chemical level , and their most char- acteristic transformation of energy is that by which the kinetic energy of the sunlight is changed into the potential energy of the complex stuffs which animals eat or ...
... simple sub- stances , at a low chemical level , and their most char- acteristic transformation of energy is that by which the kinetic energy of the sunlight is changed into the potential energy of the complex stuffs which animals eat or ...
Page 21
... simple colourless plants known as Bacteria , and at last not even by them . Nevertheless the " vivarium " experiment is both theoretically and practically possible . Now in nature there is , indeed , no closed vivarium , for there is no ...
... simple colourless plants known as Bacteria , and at last not even by them . Nevertheless the " vivarium " experiment is both theoretically and practically possible . Now in nature there is , indeed , no closed vivarium , for there is no ...
Page 42
... simple " worms , " known as " paste- eels , " " vinegar - eels , ” etc. , from their frequent occurrence in such substances , can survive desiccation for many years . Repeated experiments have shown that they can lie dormant for as long ...
... simple " worms , " known as " paste- eels , " " vinegar - eels , ” etc. , from their frequent occurrence in such substances , can survive desiccation for many years . Repeated experiments have shown that they can lie dormant for as long ...
Page 47
... simple Protozoa up to the beginning of the backboned series , we find illustrations of animals which have taken to a thievish existence as unbidden guests in or on other organisms . Flukes , tapeworms , and some other " worms , " many ...
... simple Protozoa up to the beginning of the backboned series , we find illustrations of animals which have taken to a thievish existence as unbidden guests in or on other organisms . Flukes , tapeworms , and some other " worms , " many ...
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Common terms and phrases
action activity adult Amphibians ants backboned become begin Biology birds bivalves body brain called carbonic carbonic acid Chambers's Encyclop changes characteristic ciliated colony colour complex corals crab creatures crustaceans cuttlefish Darwin division of labour earth Echinoderms egg-cell eggs embryo Encyclopædia Encyclopædia Britannica energy Erasmus Darwin evolution Evolution of Sex fact female fertilised fishes food-canal freshwater frog function grow habit Haeckel heredity higher animals hydroid individual influence Infusorians insects instincts jellyfish kinds lancelet larvæ less living matter Lond male mammals medusoids molluscs Natural History natural selection naturalists nervous nest notochord observed offspring organism origin ovum parasites parents plants Prof progress Protists protoplasm Protozoa recognise regard reproductive cells reptiles result sea-anemones seems shells simplest animals skin sometimes species spermatozoa spiders sponges strange structure struggle for existence substances suggest surroundings theory tion tissues units variations Vertebrate worms young Zoea zoology
Popular passages
Page 339 - THERE was a child went forth every day, And the first object he look'd upon, that object he became, And that object became part of him for the day or a certain part of the day, Or for many years or stretching cycles of years.
Page 174 - I believe a leaf of grass is no less than the journey-work of the stars, And the pismire is equally perfect, and a grain of sand, and the egg of the wren, And the tree-toad is a...
Page 297 - Doing this, and making the requisite addition, the formula finally stands thus :—Evolution is an integration of matter and concomitant dissipation of motion; during which the matter passes from an indefinite, incoherent homogeneity to a definite, coherent heterogeneity ; and during which the retained motion undergoes a parallel transformation.
Page 44 - When we reflect on this struggle, we may console ourselves with the full belief, that the war of nature is not incessant, that no fear is felt, that death is generally prompt, and that the vigorous, the healthy, and the happy survive and multiply.
Page 262 - It scarcely breathes with its one lung (the other shrivelled and abortive) ; it is passive to the sun and shade, and is cold or hot like a stone ; yet " it can outclimb the monkey, outswim the fish, outleap the zebra, outwrestle the athlete, and crush the tiger.
Page 289 - Fifthly, from their first rudiment, or primordium, to the termination of their lives, all animals undergo perpetual transformations, which are in part produced by their own exertions in consequence of their desires and aversions, of their pleasures and pains, or of irritations, or of associations; and many of these acquired forms or propensities are transmitted to their posterity.
Page 33 - I should premise that I use the term Struggle for Existence in a large and metaphorical sense, including dependence of one being on another, and including (which is more important) not only the life of the individual, but success in leaving progeny.
Page 24 - It may be doubted whether there are many other animals which have played so important a part in the history of the world, as have these lowly organized creatures.
Page 23 - Earth-worms, though in appearance a small and despicable link in the chain of Nature, yet, if lost, would make a lamentable chasm.
Page 289 - As air and water are supplied to animals in sufficient profusion, the three great objects of desire, which have changed the forms of many animals by their exertions to gratify them, are those of lust, hunger and security.