The Ultimate Crustacean Quiz

CORRECT ANSWERS: 0

The crustacean belongs to the same major division of the animal world as spiders, lobsters, shrimp and water flies. Take this quiz and learn more about how multi-faceted this group of creatures is.

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Question 2 of 21

What is the common factor uniting spiders, wood lice and crabs?

six legs
venomous stings when threatened
membership of same division of the animal world

... They all belong to the same phylum or major division of the animal world.

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Question 3 of 21

How many species of crustaceans are there?

25000
5000
1000

... It is estimated that there are some 25,000 species.

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Question 4 of 21

How many segments can there be in a crustacean's body?

less than 40
up to 50
60

... The body can be made up of up to 50 segments.

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Question 5 of 21

What is the cephalothorax?

extension of thorax
abdomen and thorax
head and thorax

... It is a unit comprised of the head and the thorax.

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Question 6 of 21

What is the chitin?

external skeleton
digestive system
sensory nerves

... It is a hard substance covering the body and forming an external skeleton.

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Question 7 of 21

As the crustacean grows, how does the chitin develop?

It hardens and expands.
The overlapping panels increase in number.
It is periodically shed and a new one grows.

... The chitin does not grow -- it is shed and a new one grows.

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Question 8 of 21

How does the crustacean find its way?

using appendages attached to the thorax
using its compound eyes
sensory nerves on the claws

... It has compound eyes with many lenses.

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Question 9 of 21

If the crustacean uses its claws for grasping and eating, how does it walk?

Claws are also used for walking.
Walks on legs attached to abdomen.
It doesn't walk, it swims.

... The claws are used for grasping, eating and walking.

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Question 10 of 21

How many segments does the body of the lobster have?

50
35
19

... It belongs to the high society of crustaceans that have only 19 segments, unlike the lower class with up to 50 segments.

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Question 11 of 21

What are Entomostraca?

They are the only crustaceans that are not flesh-eaters.
They are small crustaceans without distinct body segments.
They are the only crustaceans that give birth to live young and not eggs.

... They are smaller crustaceans without distinct body regions.

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Question 12 of 21

What is the ecological effect of larger, water dwelling crustaceans?

They help keep beaches and streams clean.
Their increasing numbers endanger the aquatic ecosystem.
The increased popularity of sea food decreases their numbers endangering the species.

... They are scavengers. They help keep the streams and beaches clean.

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Question 13 of 21

How do land-dwelling crustaceans contribute to agriculture?

They are vital to the fertilization of crops.
They prevent destruction of crops by insects and other pests.
Most are pests.

... Most of these crustaceans are pests and as such their impact on agriculture is negative.

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Question 14 of 21

What do lobsters, sandhoppers and wood lice have something in common?

All give birth to their eggs on dry land.
All have 19 body segments.
All are exclusively herbivores.

... They all belong to the high society of crustaceans with 19 body segments.

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Question 15 of 21

In what part of the world are barnacles a delicacy?

parts of Europe and South America
China and Japan
India and Thailand

... In parts of Europe and South America the barnacle is a delicacy.

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Question 16 of 21

For what type of cuisine is the crayfish the main ingredient?

Thai
Indian
Cajun

... Crayfish are the main ingredient in spicy Creole and Cajun cuisines of Louisiana.

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Question 17 of 21

Which marine creature enjoys a meal of krill?

sea bass
whales
lobsters

... Many whales find the krill to be a main source of nutrients.

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Question 18 of 21

What are the smallest crustaceans?

water fleas
wood lice
pill bugs

... The water flea can be as small as 1/125 inch (0.2 millimeter) long.

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Question 19 of 21

Of all the crustaceans, which are the most common?

pill bugs
krill
copepods

... The most common are copepods, tiny organisms that swim or float.

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Question 20 of 21

Are crustaceans in any danger?

All are in danger.
Most are not in danger.
Only the fresh water ones are endangered.

... Because most are small, numerous and widely distributed, there is no concern for their survival.

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Question 21 of 21

What is the average size of lobsters caught today?

20 pound (9 kilogram)
10 pound (4.5 kilogram)
1 pound (0.45 kilogram)

... The average size is about 1 pound (0.45 kilogram) as opposed to 20 to 40 pounds (9 to 18 kilogram) in the past

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