<u>An Euglena cell with a red eye spot,</u> <em><u>the eye spot is a photoreceptor organelle found in the flagellated cells of some green algae and other photosynthetic unicellular organisms such as the euglenids</u></em>.
<u>The ocular spot allows the cells to detect the direction and intensity of the light and respond towards it, or moving away</u>, <em><u>this allows the cell to search for the optimum amount of light for photosynthesis</u></em>.
The area around the "Sahara Desert" is slowly changing into a "dry region", "similar to the desert". "Trait encoding" for "short plant structure" to "reduce transport of water" is "most likely to be selected" in the "population of plants growing" in this region.
