What is the name of the person who uses fafnir

(amoeba sisters video recap: pedigrees and need

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

Why do we perceive objects as retaining their brightness under different lighting levels?