en

Charles Darwin

    Menna Abu Zahrahas quoted8 months ago
    actions become habitual in association with certain states of the mind, and are performed whether or not of service in each particular case—
    Illia Kohanhas quoted4 months ago
    Consequently the whole body of males inhabiting the same country would tend from the effects of constant intercrossing
    Illia Kohanhas quoted4 months ago
    In one country the inhabitants value a fleet or light dog or horse, and in another country a heavier and more powerful one; in neither country is there any selection of individual animals with lighter or stronger bodies and limbs; nevertheless after a considerable lapse of time the individuals are found to have been modified in the desired manner almost uniformly, though differently in each country.
    Illia Kohanhas quoted4 months ago
    called unconscious selection
    Illia Kohanhas quoted4 months ago
    two absolutely distinct countries inhabited by the same species, the individuals of which can never during long ages have intermigrated and intercrossed, and where, moreover, the variations will probably not have been identically the same, sexual selection might cause the males to differ.
    Анастасия Скрылёваhas quoted5 months ago
    bears the heading
    Анастасия Скрылёваhas quoted5 months ago
    occur which must here be omitted
    Yulia Sausanhas quoted2 years ago
    there are two factors: namely, the nature of the organism and the nature of the conditions.
    Yulia Sausanhas quoted2 years ago
    there are two factors: namely, the nature of the organism and the nature of the conditions
    Yulia Sausanhas quoted2 years ago
    They may be considered as definite when all or nearly all the offspring of individuals exposed to certain conditions during several generations are modified in the same manner.
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