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ROD. A measure sixteen feet and a half long; a perch.

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But rod cells in the mouse retina shove active genes to the outside of the nucleus, the researchers found.
The team decided to examine retinas from more than a dozen different species of mammals and found that animals active in low-light conditions, including cats, rats, deer, opossum, rabbits and ferrets, had the inside-out arrangement in rod cells.
For years, researchers have aimed to transplant stem cells to replace light-sensitive rod cells that had degenerated.
Four years ago, the same research team transplanted rod cells, used in night vision.
London, Sep 18 (ANI): Solving the mystery behind circadian rhythms, researchers have found that the rod cells in our eyes set our so called internal clocks that regulate everything from our sleep-wake cycles to our appetites and hormone levels.
When rodents were exposed to moderate daylight, up to 90 percent of the transducin moved from the outer segments to another part of the rod cells, the researchers report.
For more than 100 years, it's been known that rod cells and cone cells are responsible for sensing light, and therefore, vision," said Yau.
The rod cells may see the world differently because of the way the retina is wired, says Banks.
Rod cells are the most light-sensitive cells in the retina making them effective for nighttime vision.