which cell is present in cockroaches body which is privent the sun rays
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Cockroaches could inspire superheroes if they weren't so repulsive. Some species can hold their breath for as long as 40 minutes. Others can survive blasts of strong radiation, subsist on paper and dried glue, or live for weeks without a head. Recently researchers discovered another superpower: the nocturnal creatures can see in near–pitch black by pooling light signals over time, like time-lapse photography.
Physicists at the University of Oulu in Finland—where it is too cold for roaches to live outside of the laboratory—put about 30 American cockroaches through virtual-reality experiments to test their night vision. No, they did not make them wear tiny goggles. Instead they put each roach on a tracking ball surrounded by a spherical screen. Under increasingly dark conditions, the researchers projected images of black-and-white moving stripes onto the screen, triggering a reflex that made the roaches walk toward the stripes.
The scientists also harmlessly inserted a recording microelectrode into one of the roaches' nearly
360-degree compound eyes to record the electric blips triggered in the photoreceptor cells by photons, or particles of light. In conditions equivalent to a moonless night, the roach eye absorbed one photon every 10 seconds
Physicists at the University of Oulu in Finland—where it is too cold for roaches to live outside of the laboratory—put about 30 American cockroaches through virtual-reality experiments to test their night vision. No, they did not make them wear tiny goggles. Instead they put each roach on a tracking ball surrounded by a spherical screen. Under increasingly dark conditions, the researchers projected images of black-and-white moving stripes onto the screen, triggering a reflex that made the roaches walk toward the stripes.
The scientists also harmlessly inserted a recording microelectrode into one of the roaches' nearly
360-degree compound eyes to record the electric blips triggered in the photoreceptor cells by photons, or particles of light. In conditions equivalent to a moonless night, the roach eye absorbed one photon every 10 seconds
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