What happened to the amounts of carbon- 14 and nitrogen as each half-life passed? simple response

Differentiation of cells changes the nucleic information. true false

In the water cycle , when does water undergo a chemical change

Food webs - transferring energy and matter from one level to another. here you see four food webs. one or more are incorrect. which food web(s) show the correct sequence of organisms, from start to top level consumer? a) a b) d c) c d) a and d