Unit #7, Quiz #1 2013-2014 Grade: «grade» Subject : «subject» Date: «date»
Unit #7, Quiz #1 2013-2014
Grade:«grade»
Subject:«subject»
Date:«date»
1 The defining characteristic of an animal in the class Chondrichthyes is:
A aggressive behavior
B a cartilaginous skeleton
C a lineagethat goes back hundreds of millions of years
D the constant shedding & regrowing of teeth
2 The tiger shark has which type of caudal fin:
A homocercal
B heterocercal
C dorsal prominent
D ventral prominent
3 Sharks have a very streamline shape that is called:
A Coelomate
B Psuedocoelomate
C Pentameric
D Fusiform
4 The oldest known unambiguous chondrichthyes was found during the:
A Silurian Period
B Devonian Period
C Cambrian Period
D Tertiary Period
5 All of the following are in the subclass of Elasmobrachii, EXCEPT:
A sharks
B rays
C chimeras
D skates
6 The heterocercal shape of a shark's tail is beneficial because:
A it allows the shark to use countershading as camouflage so that it cannot be seen from above or below
B with each swish of the tail the shark amplifies its ability to detect both electrical and chemical changes in the water
C with each side-to-side movement of the tail, both forward and upward force is generated
D it allows the rostrum to protrude forward and increases the abilities of chemoreceptors found within this organ
7 Cladoselache was an important chondrichthian fossil because:
A its dorsal fins were used to walk across the bottom of the ocean
B it had heterodont dentition
C it was the first example of a species with a rostrum
D it had ligamentous teeth arranged in a whorl-shape arrangement
8 Both subclasses of chondrichthyes had their radiation event during the:
A Cambrian
B Devonian
C Cretaceous
D Tertiary
9 Sharks evolved their modern appearance during the ________
A Carboniferous Period
B Holocene Epoch
C Pleistocene Epoch
D Jurassic Period
10 Evidence suggests that the Megalodon
A was the largest aggresive carnivore on record
B had the most teeth of any known predatory animal
C was the largest animal ever to exist in the water
D still exists in large populations today
11 Hybodus was an important chondrichthian fossil because:
A its dorsal fins were preceded by large spines
B it had heterodont dentition
C it was the first example of a species with a rostrum
D it had ligamentous teeth arranged in a whorl-shape arrangement