Which types of fish have gill slits hidden beneath a gill cover?

A) jawless fishes
B) cartilaginous fishes
C) bony fishes
D) sharks and rays
E) lampreys and hagfish

Which correctly traces the path of a sound vibration?

A) auditory canal → tympanic membrane → malleus → incus → stapes → oval window → cochlea → cochlear nerve
B) auditory canal → malleus → incus → stapes → tympanic membrane → oval window → cochlea → cochlear nerve
C) auditory canal → tympanic membrane → malleus → incus → stapes → cochlea → oval window → cochlear nerve
D) auditory canal → tympanic membrane → oval window → cochlea → malleus → incus → stapes → cochlear nerve
E) auditory canal → malleus → incus → stapes → oval window → tympanic membrane → cochlea → cochlear nerve