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Sharks have been diversified into how many species ?

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470
300
280
144


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How do "horn sharks" find shellfish buried in the sand ?

A well-developed sense of smell enables them to sniff out shellfish
A well-developed sense of hearing enables them to sniff out shellfish
A well-developed sense of seeing enables them to sniff out shellfish
A well-developed sense of feel enables them to sniff out shellfish


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Some sharks have a nictitating membrane. What is this for ?

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To protect ears
To protect head
To protect fins
To protect eyes


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Which species of shark is commonly used to make the popular British food "fish" and chips ?

The great white
Shortfin mako
Whale shark
Dog fish


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What are ampullae of Lorenzini ?

Balance of boldy
A well-developed sense of smell
Tiny pores containing special sensors
Hearing Sensors


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Which species of shark is so gentle that it will allow scuba divers to ride on its back ?

The whale shark
The great white
Shortfin mako
Dog fish


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Which is the largest shark ?

Shortfin mako
Whale shark
Hexanchiformes
Benthic sharks


The largest is the whale shark, which has been known to get as large as 18 meters (60 feet).

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What is the biggest threat to shark populations all over the world ?

Deposition of nuclear waste
Sea accidents
Sea pollution
Overfishing


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What is the Class of Shark ?

Animalia
Chordata
Chondrichthyes
Elasmobranchii


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Which of these is false for Sharks ?

Sharks have rows of teeth
Sharks do not have scales
Sharks have a lateral line system
Sharks have low sense of hearing


Sharks have extremely sensitive hearing. They can identify much lower sounds than human ears can detect, and some can hear sounds more than 700 feet away. Some scientists think hearing is typically the first sense sharks use in detecting their prey.

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