Use the key to identify the fish. Start by reading the first pair of statements, then decide which of the two statements describes your specimen. The statement you choose will either give you the identity of your fish or direct you to another numbered pair of statements.
Record each number from the key that you use to identify each organism in the Numbers from the key column in Table 1.
When you have finally identified your fish, record its scientific and common names in the appropriate columns of Table 1.
Repeat steps 1 through 3 for additional specimens. An example has been completed for you.

the rocks are classified by the geological process they are formed by. the three main groups of rocks are igneous, metamorphic, and sedimentary. minerals are not they are classified under the chemical classes they are in. these groups include silicates, sulfates and carbonates.

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.