True/False
Indicate whether the
statement is true or false.
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1.
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An earthworm will become paralyzed if left in the light for an extended period
of time.
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2.
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The largest earthworm ever found was over 20 feet long.
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3.
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Most annelids are hermaphroditic.
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4.
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Marine worms exhibit highly developed sensory organs.
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5.
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A leech can have hundreds of razor sharp teeth.
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6.
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All leeches are blood suckers.
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7.
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Leeches can trasmit diseases.
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8.
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The number of earthworms in an acre of soil usually number in the low
hundreds.
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9.
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Dessication is good for annelids.
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10.
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Earthworms can drown.
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11.
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Leeches have good chemoreceptors.
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12.
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A leech bite, with its razor sharp teeth, can be very painful.
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13.
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Leeches and earthworms live up to 10 years.
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14.
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Leeches will feed on mammals, reptiles, and amphibians.
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15.
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All earthworms die when the soil freezes but their eggs will survive.
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16.
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Marine worms are a very diverse class of animals with respect to feeding.
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17.
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Blood sucking leeches break down their blood meal rather quickly.
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18.
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The earthworm clitellum is located closer to the anus than the mouth.
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19.
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Blood capillaries are close to the nephridia.
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20.
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Earthworms have the same oxygen carrying pigment in their blood as
humans.
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21.
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Many sessile marine worms are called tube worms.
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22.
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Earthworms, like round worms, have longitudinal muscle only.
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23.
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There is one opening in each nephridia segment in an earthworm.
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Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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24.
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How many “hearts” does an earthworm have?
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25.
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How many germ layers do annelids have?
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26.
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How many body segments do leeches have?
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27.
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How many “brains” do leeches have?
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28.
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How often do leeches eat?
a. | daily | d. | 5-6 times per year | b. | weekly | e. | 1-2 times per year | c. | monthly |
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29.
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Most leeches live
a. | in fresh water. | c. | on land. | b. | in marine water. | d. | in fruit. |
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30.
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Which is not a way leeches eat.
a. | use proboscis | c. | absorb their food through skin | b. | use jaws with
teeth | d. | swallow their prey
whole |
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31.
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How many jaws does a leech usually have?
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32.
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Which one does not contain a jaw?
a. | earthworm | c. | leech | b. | clam worm |
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33.
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Which organism can regenerate a lost body part?
a. | earthworm | c. | leech | b. | clam worm |
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34.
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Earthworms are
a. | cold-blooded. | b. | warm-blooded. |
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35.
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In which season do leeches reproduce?
a. | spring | c. | fall | b. | summer | d. | winter |
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36.
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A leech bite will bleed on average for
a. | 1-2 hours. | c. | 24 hours. | b. | 3-12 hours. | d. | less than 30
minutes. |
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37.
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How many suckers do leeches have?
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38.
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Which type of skeleton do annelids have?
a. | hydrostatic | c. | endoskeleton | b. | exoskeleton | d. | internal pen |
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39.
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What is the sac-like structure that increases the surface area for food
absorption in an earthworm.
a. | typhlosole | c. | cecum | b. | crop | d. | gizzard |
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40.
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Some marine worms are not predators. How do non-predator marine worms
eat?
a. | filter feed | c. | chemoautotrophs | b. | photoherotrophs | d. | photoautotrophs |
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41.
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What protects developing earthworm eggs in soil?
a. | a mucous ring | c. | male earthworm guards them | b. | female earthworm
guards them | d. | nothing, the
eggs are extremely hard |
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42.
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What is the anticoagulant found in leech saliva?
a. | hirudin | c. | hemocyanin | b. | hemolymph | d. | hemoglobin |
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43.
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Name the nervous system structure that runs the entire length of an
earthworm.
a. | ventral nerve cord | c. | lateral nerve cord | b. | dorsal nerve cord | d. | clitellum |
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44.
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A spermatophore is a(n) _____________________________.
a. | packet of sperm | d. | scent gland | b. | light sensitive pigment | e. | sensory projection | c. | organ that detects
equalibrium | f. | egg
sac |
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Multiple Response
Identify one
or more choices that best complete the statement or answer the question.
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45.
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Check all of the following in which earthworms help soil for plants.
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46.
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Check all an earthworm will eat for metabolic energy.
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Matching
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Matching section for the three classes of annelids.
a. | marine worms | e. | earthworms and
leeches | b. | earthworms | f. | marine worms and earthworms | c. | leeches | g. | all | d. | marine worms and
leeches | h. | none |
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47.
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oligochaetes
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48.
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hirudinea
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49.
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polychaetes
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50.
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does not have setae
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51.
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has a lot of setae
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52.
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has few setae
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53.
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organisms with simple eyes
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54.
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does not have eyes
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55.
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fertilization is internal
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56.
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fertilization is external
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57.
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organisms are separate sexes
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58.
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organisms are hermaphroditic
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59.
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have an open circulatory system
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60.
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have a closed circulatory system
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61.
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have parapodia
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62.
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do not have parapodia
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63.
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free swimming larval stage
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64.
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do not have a free swimming larval stage
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65.
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has an obvious clitellum
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66.
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do not have an obvious clitellum
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67.
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contain nephridia
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68.
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do not contain nephridia
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69.
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breathe through gills
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70.
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breathe through their skin
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71.
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contain sex organs throughout their lifespan
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72.
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only have sex organs during the breeding season
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Annelid anatomy a. | setae | g. | pharynx | b. | crop | h. | esophagus | c. | gizzard | i. | nephridium | d. | seminal
receptacle | j. | ganglion | e. | seminal vesicle | k. | clitellum | f. | septum | l. | parapodia |
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73.
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partitions or crosswalls that separate the organisms into segments
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74.
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a small collection of nervous tissue
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75.
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an anatomical structure that tranfers sperm
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76.
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a structure that functions as a paddlilike appendage
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77.
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a structure that functions like a kidney to get rid of waste
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78.
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a structure that grinds up food particles
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79.
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a tube that connects the throat to the crop
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80.
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a structure that stores food
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81.
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functions as a throat
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82.
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a structure that produces thick mucus
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83.
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a structure that functions to receive sperm
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84.
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an anatomical structure which functions as a short bristle-like
appendage
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Short Answer
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85.
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List the six sexual structures found in an earthworm.
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