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Level 2 Quiz
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1

Which vertebrate feature is not found in ascidians and cephalochordates?
A)skull
B)gill or pharyngeal slits
C)dorsal nerve cord
D)tail
2

Unlike cartilaginous or bony fishes, jawless fishes do not have
A)a mouth.
B)fins.
C)scales.
D)teeth.
3

The largest sharks and rays feed on which of these?
A)fish
B)seals
C)mollusks
D)plankton
4

Which is not recommended as a way to decrease one's risk of shark attack?
A)Stay away from sea lion colonies.
B)Don't go swimming at night.
C)If you see a shark, splash at it vigorously.
D)Don't touch a shark or grab its tail.
5

Electric rays
A)crush their prey.
B)catch plankton.
C)use their electric organs in defense against predators.
D)shock the fish they eat.
6

Skates
A)have elaborate courtship displays.
B)give birth to live young.
C)have stinging spines.
D)lay egg cases.
7

Ratfishes live in
A)estuaries.
B)sandy coastal areas.
C)very polluted areas.
D)the deep sea.
8

The body of a bony fish often is covered by which of these?
A)placoid scales
B)spines
C)ctenoid scales
D)fin rays
9

Eel-shaped fishes often live
A)on sandy sea floors.
B)in narrow spaces among rocks.
C)among sponges.
D)near the surface of the open sea.
10

A lionfish has venomous spines. What kind of coloration might it have?
A)cryptic--blending in with rocks and coral
B)warning--bold stripes on its body and fins
C)all red
D)countershaded--dark above, light below
11

Digestive enzymes are produced by all of these except
A)pyloric caeca.
B)liver.
C)pancreas.
D)cloaca.
12

Some sharks feed by
A)taking bites out of prey larger than themselves.
B)protruding their lower jaws.
C)sucking invertebrates from the bottom.
D)grazing on algae.
13

Anadromous fishes
A)spawn in the ocean.
B)defend territories.
C)shed their eggs in the open sea.
D)show homing behavior.
14

Among fishes, eggs are retained in a nest by
A)sting rays.
B)sea horses.
C)damselfishes.
D)herring.
15

It can be difficult to identify larval fishes to species because
A)they drift far from land.
B)most larvae remain in an egg case.
C)development takes a long time.
D)the larvae may not resemble their parents at all.





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