The focea centralis functions to promote daytime vision, being the site of concentrated photoreceptors called cone cells.
Answer:
Where are the questions though?
Answer:
Presence of acidic oxides and other chemicals in air can change the PH value of the Rain.
Explanation:
Generally, PH value of rain remains 5.0. But when the air composition changes due to sulfur dioxide or nitrogen oxides released from automobiles and coal based power plants, the combination of these with rain water makes rainy water more acidic. This results in change of PH value of Rain.
both eyes accounting for about 0.02% of body mass
