Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Transcribed Image Text:7. A student uses this diagram to understand
the parts of a fish. The student then uses an
identification key to classify different types
of fish.
Dorsal fins
Tail fin
Pectoral fin Anal fin
Ventral or pelvic fin
Identification Key
Step
Characteristic
Identification
la
Whisker-like barbels present on head next to mouth
Go to 2
1b No whisker-like barbels present on head next to mouth
Go to 3
2a Tail fin forked
Catfish
2b Tail fin rounded
Tadpole madtom
За
Mouth located on ventral (lower) surface of head
Go to 4
3b Mouth not located on ventral surface of head
Go to 5
4a
Front edge of dorsal fin at least four times as long as back edge
Quillback
Front edge of dorsal fin less than four times as long as back edge
5a Body long and thin, more than twice as long as tail
5b Body rounded, approximately twice as long as tail
4b
Black redhorse
Trout
Bluegill
Based on the key, which of these fish is
most likely a bluegill?
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