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A yawn is a reflex in vertebrate animals characterized by a long inspiratory phase with gradual mouth gaping, followed by a brief climax (or acme) with muscle stretching, and a rapid expiratory phase with muscle relaxation, which typically lasts a few seconds.
Frogs and toads produce a rich variety of sounds, calls, and songs during their courtship and mating rituals. The callers, usually males, make stereotyped sounds in order to advertise their location, their mating readiness and their willingness to defend their territory; listeners respond to the calls by return calling, by approach, and by going silent.
Since males are too small to grip the female during mating as other frogs do, the male secretes a kind of glue to keep the mating pair together. [3] The stuck-together pair burrow backwards into the soil until they reach the chamber the female has dug 30 cm below the soil surface. There the female lays her eggs.
Why do I yawn when I’m bored? Karen D. Sullivan, Ph.D., board-certified neuropsychologist and creator of I Care For Your Brain calls boredom-induced yawning the “biggest myth” associated ...
In a new study, researchers from the University of Nottingham looked at the brain to determine what makes yawning contagious.
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Frogs must be able to move quickly through their environment to catch prey and escape predators, and numerous adaptations help them to do so. Most frogs are either proficient at jumping or are descended from ancestors that were, with much of the musculoskeletal morphology modified for this purpose.
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