About Earthworm digestive system

Following are some of the multiple choice questions on the Earthworm digestive system with answers that will help the students in developing their knowledge.

Earthworm digestive system MCQ

1. How do earthworms move?

  • with their strong muscles
  • with their legs
  • with their arms
  • with their hands

2. A __________ is an earthworm's greatest enemy.

  • cat
  • dog
  • mole
  • mouse

3. What phylum does the earthworm belong?

  • Annelid
  • Anthropod
  • Insecta
  • Invertebra

4. Earthworms have which type of symmetry?

  • Radial
  • Bilateral
  • No Symmetry
  • Prismatic

5. The earthworm is divided into

  • Segments
  • 3 Parts
  • Circles
  • Front and Back

6. Bottom side of the earthworm 

  • Dorsal
  • Ventral
  • Anterior
  • Posterior

7. Which structure is NOT associated with digestion?

  • Gizzard
  • pharynx
  • nephridia
  • crop

8. Annelids are hermaphrodites. Define this term.

  • They have three tissue layers.
  • They have a body cavity.
  • They produce both egg and sperm.
  • They can regenerate lost body parts.

9. Why must an earthworm’s skin be kept moist?

  • for reproduction
  • as defense against predators
  • so it can excrete wastes
  • so it can absorb oxygen

10. As the mouth is the entrance of the digestive system of an annelid, this structure is the exit.

  • intestine
  • parapodia
  • nephridium
  • anus

11. What do earthworms eat?

  • grass
  • insects
  • dirt
  • organic matter in the soil

12. Thickened non-segmented structure of the body indicating an adult worm that is available for reproduction

  • Setae
  • Clitellum
  • Crop
  • Gizzard

13. Bristle-like structures in which help the worm move

  • Setae
  • Clitellum
  • Gizzard
  • Crop

14. This structure is used for food storage.

  • Clitellum
  • Crop
  • Setae
  • Gizzard

15. Heart-like structure

  • Gizzard
  • Aortic Arches
  • Setae
  • Crop

16. Indicates away from the head

  • Anterior
  • Posterior
  • Ventral
  • Dorsal

17. Backside

  • Anterior
  • Posterior
  • Ventral
  • Dorsal

18. Abdominal Side

  • Anterior
  • Posterior
  • Ventral
  • Dorsal

19. Indicates toward the head

  • Anterior
  • Posterior
  • Ventral
  • Dorsal

20. What function do the aortic arches have?

  • transfer oxygen
  • pump blood throughout the body
  • send and receive sensory information
  • none of the above

21. The bottom of the earthworm is called which surfact?

  • dorsal
  • ventral
  • top
  • bottom

22. What is the most important job of the earthworm?

  • food for people
  • to fertilize and mix up soil
  • as bait to catch fish
  • All of above

23. Which is NOT true about earthworms’ role in the environment?

  • They mix and loosen soil
  • They break down decaying plant material
  • They eat living plants.
  • They release nutrients plants need to grow

24. What is the function of the pharynx?

  • stores and softens food
  • pushes food to esophagus between
  • store sperm
  • pump blood throughout the body

25. All of the following body systems can be found in a segmented worm EXCEPT the _______.

  • Circulatory
  • Digestive
  • Reproductive
  • Skeletal

26. Seminal vesicles and receptacles are part of which body system?

  • reproductive
  • muscular
  • skeletal
  • urinary

27. The structure that transports the food from the pharynx to the crop is called...

  • larynx
  • trachea
  • esophagus
  • pyloric sphincter

28. Earthworms belong to Phylum______________

  • Platyhelminthes
  • Annelida
  • Nematoda
  • Mollusca

29. The earthworm's body is divided into ___.

  • 3 parts
  • segments
  • circles
  • none of the above

30. Earthworms don't have teeth to grind their food so they use another organ to do so. It is called a ___.

  • crop
  • gizzard
  • intestine 
  • esophagus 

31. An earthworm has both male and female organs. It is known as a ________.

  • hermaphrodite
  • condaphrodite
  • sterile animal
  • none of the above

32. The swollen part of the worm is called the __________. It signals that the worm is an adult and is able to reproduce.

  • gizzard
  • crop
  • clitellum
  • segment

33. Which vessel moves blood toward the anterior end of the worm?

  • ventral vessel
  • dorsal vessel
  • aortic arches
  • coelom

34. How can you tell the dorsal side from the ventral side?

  • The dorsal side is darker than the ventral side
  • The ventral side is darker than the dorsal side
  • The dorsal side has more segments than the ventral side
  • The dorsal side is flatter than the ventral side

35. Temporary storage area for food

  • Crop
  • Gizzard
  • Pharynx
  • Intestine

36. Why is the esophagus difficult to see in an earthworm?

  • An earthworm does not have an esophagus
  • It is the same color as the skin.
  • It is hidden by the reproductive and circulatory systems.
  • It is inside the pharynx.

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