An illustration of two fish is provided, Which paired statements could be used to know the difference between the fish using a dichotomous key?
a
mouth at front of head. mouth on underside of head.
b
rounded caudal fin. forked caudal fin.
c
one set of dorsal fins. two sets of dorsal fins
d
eyes on side of head. eyes on top of head.
To distinguish between the two fish using a dichotomous key, the following paired statements could be used:
1. Does the fish have its mouth at the front of its head or on the underside of its head?
2. Does the fish have a rounded caudal fin or a forked caudal fin?
3. Does the fish have one set of dorsal fins or two sets of dorsal fins?
4. Are the fish's eyes located on the side of its head or on the top of its head?