The instincts of nest-building, incubation and the rearing of young, though they occur later in life than those concerned in locomotion and the obtaining of food, are none the less founded on a hereditary basis, and in some respects are less rather than more liable to modification by the experience gained by the carrying out of hereditarily definite modes of procedure.
The impulse to migrate, that is to say, the calling forth of specific activities by climatal or other presentations, appears to be instin tive; whether the direction of migration is in like manner instinctive is a matter of uncertainty; and, if it be instinctive, the nature of the stimuli and the manner in which they are hereditarily linked with responsive acts is unexplained.
The rough experience of this voyage did more than endow him with renewed health; it changed him from a dreamy, sensitive boy, hereditarily disinclined to any sort of active career, into a selfreliant, energetic man, with broad interests and keen sympathies.
The view that instinct is the hereditarily fixed result of habit derived from experience long dominated all inquiry into the subject, but we may now expect to see a renewed and careful study of animal instincts carried out with the view of testing the applicability to each instance of the pure Darwinian theory without the aid of Lamarckism.
A short, stout, ruddy young fellow, very pugnacious concerning whales, who somehow seemed to think that the great leviathans had personally and hereditarily affronted him; and therefore it was a sort of point of honour with him, to destroy them whenever encountered.
How would you define hereditarily? Add your definition here.