What is the difference between the flowing water model and the flowing water on earth?

When lactate builds up in a runners muscles it causes a burning sensation what causes this to occur

In many humans, exposing the skin to sunlight over prolonged periods of time results in the production of more pigment by the skin cells (tanning). this change in skin color provides evidence that -

Biology ! the conversion of inorganic carbon to organic carbon by plants during photosynthesis is known as _[blank]_. filtration immigration reabsorption primary production