The Study of Animal Life |
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Page 9
... recognise their true position . Below this come certain claimants for Vertebrate distinction , notably one Balanoglossus , a worm- like animal , idolised by modern zoology as a connecting link between the backboned and backboneless ...
... recognise their true position . Below this come certain claimants for Vertebrate distinction , notably one Balanoglossus , a worm- like animal , idolised by modern zoology as a connecting link between the backboned and backboneless ...
Page 37
... or individualism , one must recognise the existence of altruism , parental love and sacrifice , mutual aid , care for others , and sociality . Before we consider these different forms of struggle , let CHAP . III 37 The Struggle of Life.
... or individualism , one must recognise the existence of altruism , parental love and sacrifice , mutual aid , care for others , and sociality . Before we consider these different forms of struggle , let CHAP . III 37 The Struggle of Life.
Page 69
... recognised by Milne - Edwards in 1827 . Among the Stinging - animals there are many animal colonies , aggregates of individuals , with a common life . These begin from a single individual and are formed by prolific budding , as a hive ...
... recognised by Milne - Edwards in 1827 . Among the Stinging - animals there are many animal colonies , aggregates of individuals , with a common life . These begin from a single individual and are formed by prolific budding , as a hive ...
Page 70
... recognising their utility to the colony as a whole we can hardly overlook the fact that their life as individuals is practically nil . They well illus- trate the dark side of division of labour . FIG . 14. - Colony of Hydractinia ...
... recognising their utility to the colony as a whole we can hardly overlook the fact that their life as individuals is practically nil . They well illus- trate the dark side of division of labour . FIG . 14. - Colony of Hydractinia ...
Page 74
... , from the nature of the ground , impossible . The Indians have invested beavers with immortality , but it is enough for us to recognise that they exhibit more sagacity than can be explained by heredi- 74 PART I The Study of Animal Life.
... , from the nature of the ground , impossible . The Indians have invested beavers with immortality , but it is enough for us to recognise that they exhibit more sagacity than can be explained by heredi- 74 PART I The Study of Animal Life.
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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.