Questions About Arthropods
Arthropods – Multiple Choice Questions
1. What is a defining characteristic of all arthropods?
A) Soft body and tentacles
B) Radial symmetry
C) Segmented body with exoskeleton
D) Unsegmented, coiled body
E) Absence of nervous system
2. The arthropod exoskeleton is primarily composed of:
A) Cellulose
B) Chitin
C) Collagen
D) Calcium carbonate
E) Keratin
3. Which of the following organisms is an arthropod?
A) Snail
B) Octopus
C) Earthworm
D) Spider
E) Starfish
4. Which class of arthropods includes crabs, lobsters, and shrimp?
A) Insecta
B) Arachnida
C) Myriapoda
D) Crustacea
E) Diplopoda
5. What is the main method of growth in arthropods due to their exoskeleton?
A) Budding
B) Binary fission
C) Moulting (ecdysis)
D) Fusion
E) Fragmentation
6. The majority of known arthropod species belong to which class?
A) Crustacea
B) Arachnida
C) Insecta
D) Chilopoda
E) Diplopoda
7. Insect bodies are divided into how many main parts?
A) One
B) Two
C) Three
D) Four
E) Five
8. How many legs do adult insects typically have?
A) 4
B) 6
C) 8
D) 10
E) 12
9. Which of the following arthropods has four pairs of legs and no antennae?
A) Grasshopper
B) Crab
C) Butterfly
D) Spider
E) Millipede
10. What structure do insects use to detect odors and vibrations?
A) Mandibles
B) Antennae
C) Wings
D) Spiracles
E) Ocelli
11. Which class includes centipedes?
A) Crustacea
B) Insecta
C) Chilopoda
D) Diplopoda
E) Arachnida
12. Millipedes differ from centipedes by having:
A) Fewer legs
B) Flat body shape
C) One pair of legs per segment
D) Two pairs of legs per segment
E) Poisonous fangs
13. Which arthropod structure allows for gas exchange in terrestrial insects?
A) Lungs
B) Skin
C) Spiracles and tracheae
D) Gills
E) Book lungs
14. The compound eye in arthropods provides:
A) Only color vision
B) Limited movement detection
C) Simple black and white vision
D) Wide-angle vision and movement detection
E) Only night vision
15. What do arachnids use to inject venom or digest prey externally?
A) Pedipalps
B) Spinnerets
C) Fangs (chelicerae)
D) Antennae
E) Mandibles
16. The process by which arthropods shed their exoskeleton is called:
A) Fertilization
B) Pupation
C) Ecdysis
D) Segmentation
E) Respiration
17. Which of the following is not a member of the phylum Arthropoda?
A) Butterfly
B) Scorpion
C) Octopus
D) Tick
E) Beetle
18. Which group of arthropods often has gills and is mostly aquatic?
A) Insecta
B) Arachnida
C) Myriapoda
D) Crustacea
E) Chilopoda
19. How do most insects reproduce?
A) Asexually through budding
B) Internal fertilization with egg laying
C) Binary fission
D) External budding
E) Cell division
20. Which of the following is true of all arthropods?
A) They have soft, unsegmented bodies
B) They lack bilateral symmetry
C) They are vertebrates
D) They possess jointed appendages
E) They are acoelomates
- Questions on Flatworms (Phylum Platyhelminthes)
- Questions on Roundworms (Phylum Nematoda)
- Questions on Mollusks (Phylum Mollusca)
- Questions on Annelids (phylum Annelida)
Answers and Explanations
1. C) Segmented body with exoskeleton – Key traits of arthropods.
2. B) Chitin – Their exoskeleton is made of chitin.
3. D) Spider – An arthropod (class Arachnida).
4. D) Crustacea – Crabs, shrimp, and lobsters belong here.
5. C) Moulting (ecdysis) – They shed their exoskeleton to grow.
6. C) Insecta – The most diverse class in the animal kingdom.
7. C) Three – Head, thorax, and abdomen.
8. B) 6 – All adult insects have six legs.
9. D) Spider – Has eight legs and no antennae.
10. B) Antennae – Used for sensing their environment.
11. C) Chilopoda – Centipedes belong to this class.
12. D) Two pairs of legs per segment – Unique to millipedes.
13. C) Spiracles and tracheae – Insects breathe through these.
14. D) Wide-angle vision and movement detection – Compound eyes offer this.
15. C) Fangs (chelicerae) – Used by spiders to inject venom.
16. C) Ecdysis – The molting process in arthropods.
17. C) Octopus – It's a mollusk, not an arthropod.
18. D) Crustacea – Most live in water and have gills.
19. B) Internal fertilization with egg laying – Common reproductive strategy.
20. D) They possess jointed appendages – Defining feature of arthropods.
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