The Beginnings of Life: Being Some Account of the Nature, Modes of Origin and Transformations of Lower Organisms, 2. kötetMacmillan and Company, 1872 - 640 oldal |
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acid Actinophrys aggregation Algæ Amabæ ammonic tartrate Amoeba amoeboid amongst animal appear assume Bacteria become bodies capable cells changes chlorophyll Ciliated Infusoria colour colourless complex contained corpuscles crystalline crystals cyst decolourized Desmids diameter Diatoms diseases embryo encysted Euglena evolution examination existence fact fermentation filaments fission flagellum flask fluid forms Fungi fungus Fungus-germs germs globules gonidia gradually granular granules Gros heterogenetic increased influence kind Leptothrix less Lichens living matter living things mass ment microscopical minute mode of growth mode of origin molecular molecules Monads nature Nematoids observations occur organisms Oxytricha particles pellicle plants portions Pouchet present produced protoplasm reproduction Rotifers says seems seen segmentation similar solution species specimens specks of living spherical Spirogyra spores stages substance surface take place Tardigrades temperature tendency tion tissues Torula transformation turbidity Turnip Infusion undergo Vaucheria vegetal vesicles Vibriones Vorticella whilst zoospores
Népszerű szakaszok
cxxix. oldal - Holds such an enmity with blood of man, That, swift as quicksilver, it courses through The natural gates and alleys of the body ; And, with a sudden vigour, it doth posset And curd, like eager droppings into milk, The thin and wholesome blood...
573. oldal - As many more individuals of each species are born than can possibly survive; and as, consequently, there is a frequently recurring struggle for existence, it follows that any being, if it vary however slightly in any manner profitable to itself, under the complex and sometimes varying conditions of life, will have a better chance of surviving, and thus be naturally selected. From the strong principle of inheritance, any selected variety will tend to propagate its new and modified form.
606. oldal - As all the living forms of life are the lineal descendants of those which lived long before the Cambrian epoch, we may feel certain that the ordinary succession by generation has never once been broken, and that no cataclysm has desolated the whole world.
53. oldal - It is difficult to avoid associating the inertness of colloids with their high equivalents, particularly where the high number appears to be attained by the repetition of a smaller number. The inquiry suggests itself whether the colloid molecule may not be constituted by the grouping together of a number of smaller crystalloid molecules, and whether the basis of colloidality may not really be this composite character of the molecule.
633. oldal - ... his mental constitution may continue to advance and improve, till the world is again inhabited by a single nearly homogeneous race, no individual of which will be inferior to the noblest specimens of existing humanity.
120. oldal - The change from a diffused, imperceptible state, to a concentrated, perceptible state, is an integration of matter and concomitant dissipation of motion; and the change from a concentrated, perceptible state, to a diffused, imperceptible state, is an absorption of motion and concomitant disintegration of matter.
95. oldal - ... other. The forces exercised by each unit on the aggregate, and by the aggregate on each unit, must ever tend towards a balance. If nothing prevents, the units will mould the aggregate into a form in equilibrium with their pre-existing polarities. If contrariwise, the aggregate is made by incident actions to take a new form, its forces must tend to re-mould the units into harmony with this new form ; and to. say that the physiological units are in any degree so...
572. oldal - Hence every detail of structure in every living creature (making some little allowance for the direct action of physical conditions) may be viewed either as having been of special use to some ancestral form, or as being now of special use to the descendants of this form — either directly, or indirectly, through the complex laws of growth.
98. oldal - ... type. Throughout the process of evolution, the two kinds of units, mainly agreeing in their polarities and in the form which they tend to build themselves into, but having minor differences, work in unison to produce an organism of the species from which they were derived, but work in antagonism to produce copies of their respective parent-organisms. And hence ultimately results, an organism in which traits of the one are mixed with traits of the other.
24. oldal - ... suppose, that the chemical units combine into units immensely more complex than themselves, complex as they are ; and that in each organism, the physiological units produced by this further compounding of highly compound atoms, have a more or less distinctive character. We must conclude that in each case, some slight difference of composition in these units, leading to some slight difference in their mutual play of forces, produces a difference in the form which the aggregate of them assumes.