On a fishing trip, rebecca catches a fish that she has never seen before. what characteristics should she look at to determine which of the three main groups of fish her catch belongs to? what would she find if the fish is a bony fish?

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length of a column of water 1.00 km high for a temperature increase of 1.00ºc. note that this calculation is only approximate because ocean warming is not uniform with depth. (answer in ×10^{-3} −3 m)