How does a stream typically change as it flows from its headwaters to its mouth?

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

Which substance contains thylakoids? a) nadph b)atp c)stroma d)chloroplast

Match each symbol with its description.