The bee-eater utilises the bill as pickaxe and the feet as ejectors. [Please select]
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Sometimes the bird utilises the deserted cradle of a fishing-eagle or vulture. [Please select]
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But a foresight still greater and nearer to his is manifested by those ants who breed and keep near them animals of different species, not for the sake of their flesh, but for certain secretions, just as man utilises the milk of the cow or the goat. [Please select]
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Man utilises defences of this kind; it is thus at the entrance of a field, for example, he places a turnstile, or parallel bars that do not face each other; the passage is not closed for him, but a cow is too long to overcome the obstacle. [Please select]
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