phototaxis उदाहरण वाक्य

As the cell rotates with respect to the light source, the eyespot partially blocks the source, permitting the " Euglena " to find the light and move toward it ( a process known as phototaxis ).
Some millions of years later, this story goes, a few of these phototaxis-capable bacteria drift up from the dark depths of the ocean to shallow hot springs, where they can continue on their old diet of sulfides.
They mediate light responses as varied as visual perception, phototropism and phototaxis, as well as responses to light-dark cycles such as circadian rhythm and other photoperiodisms including control of flowering times in plants and mating seasons in animals.
:Paramecium doesn't have eyes-it's a single-cell organism so it cannot have organs, only organelles-but it does have a photoreceptor and it does exhibit phototaxis .-- talk ) 22 : 49, 22 April 2016 ( UTC)