Best describes the relationship between photosynthesis and cellular respiration in terms of energy and matter

What are the four basic classes of organic molecules how do they differ structurally and functionally

Asquirrel population lives in an area. over many years, a river in that area grows wider and stronger, eventually forming a canyon. the squirrel populations on the two sides of the canyon can no longer mate with each other and ultimately form distinct species. this is an example of

What is the term for a water wave that is created by an underwater earthquake?