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Updated: May 15, 2025
Consequently the males which varied in brightness whilst young would suffer much destruction and be eliminated through natural selection; on the other hand, the males which varied in this manner when nearly mature, notwithstanding that they were exposed to some additional danger, might survive, and from being favoured through sexual selection, would procreate their kind.
But I am ligating with linen thread, which does not dissolve, and if you come back to me in one year from now I will remove the ligatures, one or both, and you will then be able to procreate." This is reasonable and wise talk, and the man makes no objection.
Again in this period of increasing speed in the expenditure of energy we find the thyroid, the adrenals, and the hypophysis also in rapid growth. Without the normal development of the ovary, the thyroid, and the hypophysis, neither the male nor the female can develop the secondary sexual characters, nor do they develop sexual desire nor show seasonal cycles of activity, nor can they procreate.
The slug must take to itself food, else it will perish; and so I. The slug must procreate its kind, or its kind will perish; and so I. The need being the same, the only difference is in the expression. In all life come times and seasons when the individuals are aware of dim yearnings and blind compulsions and masterful desires. The senses are quickened and alert to the call of kind.
"You are talking pure nonsense, sir," returned Count Roumovski sternly. "If that were the case the wording of your English marriage service would be different. First and foremost, marriage is a contract between two people to live together in union of body and to procreate children, which is the law of God and nature.
But in no case do I permit a grandfather or grandmother to entertain the hope that they may be rejuvenated to such an extent that they can procreate again if they wish. This is mere romance, with which I have nothing to do.
That the individual will rear its offspring in safety and that they will inherit the peculiarities of their parents, enabling them, in their turn, to procreate their kind; all this will certainly follow. We are not concerned, however, at the moment, with the direct effect upon the individual, but with the consequences that will accrue to the species as a whole.
If their presence proved useful to the species which had seized them if it were more advantageous to this species, to capture workers than to procreate them the habit of collecting pupae, originally for food, might by natural selection be strengthened and rendered permanent for the very different purpose of raising slaves.
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