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Arthropods Quiz
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1

What does the name “arthropod” mean?
2

What are the defining characteristics of the Phylum Arthropoda?
3

What percentage of the animal species belong to the Phylum Arthropoda?
4

What is tagmatization?
5

Which 2 major groups of arthropods have 3 distinct tagmata? What are the 3 tagmata?
6

How is the molluscan shell similar to and different from the arthropod outer covering?
7

What is chitin? What are the functions of chitin in arthropods?
8

How is the outer layer (procuticle) of arthropods strengthened?
9

Why was the development of a jointed flexible skeleton important to arthropod success?
10

Since the coelom is reduced in arthropods, what is the main body cavity called?
11

How does an arthropod increase its body size? What is ecdysis? What controls ecdysis?
12

How does the musculature of arthropods differ from that of other inverts? Why is this important?
13

Is the arthropod circulatory system “open” or “closed”?
14

Which 3 groups include <95% of all arthropod species?
15

What is the defining characteristic of trilobites? Are they extinct or extant?
16

What are the defining characteristics of the Subphylum Chelicerata?
17

Chelicerates are the only group of arthropods that lack ________________. They also lack _____________________.
18

What are chelicerae? What is their main function?
19

What are the defining characteristics of the Class Merostomata?
20

Which merostomates are extinct?
21

What animals are included in the Class Arachnida?
22

Why are spiders economically important?
23

Identify structures of arachnids: prosoma, chelicerae, pedipalps, walking legs, opisthosoma (abdomen), book lungs, spiracles, tracheae, spinnerets.
24

Why are mites and ticks economically important?
25

What are the defining characteristics of the Class Pycnogonida?
26

What is their common name and habitat?
27

What are ovigers?





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