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Annelids Quiz
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1

The name "annelid" comes from a Latin name that means _____________________.
2

What is the “defining characteristic” of annelids?
3

What are the general characteristics of annelids?
4

What is metamerism?
5

Why are annelids restricted to moist environments?
6

Describe the structure of a metanephridium.
7

Which class of annelids has the greatest species diversity?
8

Identify: prostomium, peristomium, parapodia, acicula.
9

What are the 2 major groups of polychaetes?
10

Most polychaetes have __________ reproduction and they are _________________ (have separate sexes).
11

Where are the gametes produced in polychaetes?
12

Describe epitoky. What is an epitoke? An atoke?
13

Fertilization in polychaetes is ____________ (external, internal). The characteristic larva with ciliated rings is called a ____________________. Which other annelids have this type of larva? Which annelids do not have this type of larva?
14

What are the 2 major groups of worms (formerly 2 classes, now subclasses) now included in the Class Clitellata? What are the defining characteristics of clitellatids?
15

What is the function of the clitellum?
16

The Subclass Oligochaeta includes worms that primarily live in which environments?
17

Compare oligochaetes with polychaetes.
18

The Subclass Hirudinea includes what organisms? Where do they live?
19

What is the defining characteristic of leeches?
20

How do leeches differ from polychaetes and oligochaetes?
21

How do leeches feed? What is hirudin?
22

What are the defining characteristics of the Class Pogonophora? What does the name mean?
23

Where do pogonophorans live? (What is their habitat or environment?)
24

What is the function of the trophosome? Why is it important in deep-ocean species?
25

What is unusual about their digestive system?
26

Where do the vestimentiferan pogonophorans live?
27

The Class Echiura is also now included in the Phylum Annelida. An example is the “innkeeper worm” that lives commensally in the tube of the parchment worm or in its own U-shaped burrow with other commensals. What does the name “echiura” mean? What is the defining characteristic of the class?
28

What is the most conspicuous feature of echiurans?
29

What does the name “sipuncula” mean? What are the defining characteristics of the Phylum Sipuncula?
30

Why are sipunculids excluded from the phylum Annelida? Molecular evidence suggests that they are more closely related to which phylum?





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