Nurse sharks are the laziest of sharks. Because they do not have to move to breathe, they are quite sedentary. Take this quiz to learn more about the nurse shark.
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Question 2 of 16
Which fin makes up more than 25 percent of the nurse shark's length?
dorsal
caudal
pectoral
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Nurse sharks have a very long caudal fin, making up more than 25 percent of its length.
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Question 3 of 16
What does the nurse shark use to suck in food?
pharynx
barbels
large mouth
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The nurse shark uses its pharynx, which is a muscular cavity, to suck in its prey.
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Question 4 of 16
What type of teeth does the nurse shark have?
small
non-serrated
both answers
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The nurse shark has small and non-serrated teeth.
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Question 5 of 16
If nurse sharks do not have razor sharp teeth, why are they a danger to humans?
very strong bite
cutting bite
tearing bite
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Although they do not have the same bite as sharks with razor sharp teeth, the nurse shark has an incredibly strong and damaging bite.
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Question 6 of 16
How does the nurse shark sense its prey?
barbels
protruding eyes
exceptional hearing
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The nurse shark uses its barbels to smell the scent of its next meal.
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Question 7 of 16
What physical trait allows the nurse shark to be rather sedentary?
must move to breathe
breathe without moving
both answers
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Some sharks have ram-jet ventilation and must move to breathe. Nurse sharks have a respiratory system that pumps water over their gills so they can to breathe without moving.
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Question 8 of 16
When do nurse sharks hunt for food?
day
night
both answers
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Nurse sharks mostly hunt for food at night.
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Question 9 of 16
What do nurse sharks do during the daylight hours?
hunt
rest
both answers
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They rest during the day.
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Question 10 of 16
Where is a fun and safe place to observe a nurse shark?
New England Aquarium
Caribbean Sea
Gulf of Mexico
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Nurse sharks may be viewed on display in aquariums such as the New England Aquarium in Boston, Massachusetts. When captured they are easy to care for and quite hardy.
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Question 11 of 16
How do nurse sharks encourage genetic diversity?
fertilization by more than on male nurse shark
mate with other species of shark
neither answer
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A litter of pups may be fertilized by more than one male nurse shark.
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Question 12 of 16
How does the male shark get a female to mate?
bites her pectoral fin
holds her in place
both answers
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The male shark bites the female's pectoral fin and holds her in place.
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Question 13 of 16
What is the length of shark pups at birth?
six inches
one foot
two feet
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The babies are born already one foot long.
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Question 14 of 16
How long is the pregnancy of a nurse shark?
six months
nine months
eleven months
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The nurse shark is pregnant for six months.
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Question 15 of 16
If nurse sharks are meat eaters, why have corral and algae been found in their stomachs?
unintentionally
like crunchy corral
algae is nutritious
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Nurse sharks suck up their prey, and sometimes they suck up corral and algae unintentionally.
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Question 16 of 16
When do nurse sharks attack humans?
only when provoked
to protect their pups
when hungry
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Usually nurse sharks will attack humans only when provoked -- like when stepped upon in shallow water. Their bite is exceptionally strong, and surgery or special equipment has been needed to release the shark's bite.
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