Questions about Arachnida
Multiple-Choice Questions on Arachnida (Animal Kingdom)
1. The class Arachnida belongs to which phylum?
A) Mollusca
B) Annelida
C) Arthropoda
D) Nematoda
E) Echinodermata
2. Which of the following animals is not an arachnid?
A) Spider
B) Scorpion
C) Tick
D) Mite
E) Centipede
3. How many pairs of legs do adult arachnids have?
A) 3
B) 4
C) 5
D) 6
E) 8
4. What type of symmetry do arachnids exhibit?
A) Radial
B) Asymmetrical
C) Bilateral
D) Spiral
E) Quadrilateral
5. Which of the following body regions is not found in arachnids?
A) Cephalothorax
B) Abdomen
C) Head
D) Pedipalps
E) Prosoma
6. How many antennae do arachnids possess?
A) None
B) One pair
C) Two pairs
D) Three pairs
E) Four pairs
7. What is the function of chelicerae in arachnids?
A) Sensory perception
B) Excretion
C) Defense and feeding
D) Respiration
E) Reproduction
8. How do most arachnids breathe?
A) Through gills
B) Through lungs
C) Through book lungs or tracheae
D) Through their skin
E) Through spiracles only
9. Which of these structures are used by spiders to spin webs?
A) Mandibles
B) Pedipalps
C) Spiracles
D) Spinnerets
E) Chelicerae
10. What do ticks and mites primarily feed on?
A) Plants
B) Insects
C) Blood or skin cells
D) Detritus
E) Pollen
11. Which of these arachnids is venomous and uses its stinger for defense?
A) Mite
B) Tick
C) Scorpion
D) Harvestman
E) Tarantula hawk
12. How many body segments do arachnids typically have?
A) One
B) Two
C) Three
D) Four
E) Five
13. Which of the following is true about arachnids?
A) They have wings
B) They are mostly aquatic
C) They have compound eyes
D) They are mainly terrestrial
E) They have three antennae
14. What is the role of pedipalps in many arachnids?
A) Respiration
B) Locomotion
C) Capturing prey, mating, or sensory functions
D) Spinning silk
E) Laying eggs
15. Which arachnid is known for transmitting Lyme disease?
A) Spider
B) Mite
C) Tick
D) Scorpion
E) Harvestman
16. Arachnids have which type of skeleton?
A) Endoskeleton
B) Hydrostatic skeleton
C) Cartilaginous skeleton
D) Chitinous exoskeleton
E) Bony skeleton
17. Which of these arachnids does not produce silk?
A) Orb-weaver spider
B) Funnel-web spider
C) Scorpion
D) Cobweb spider
E) Tarantula
18. What characteristic differentiates spiders from other arachnids?
A) Presence of pedipalps
B) Ability to produce venom
C) Eight legs
D) Silk production and web spinning
E) Living on land
19. What is the function of book lungs in arachnids?
A) Reproduction
B) Feeding
C) Circulation
D) Respiration
E) Digestion
20. What is the typical diet of most spiders?
A) Blood
B) Plants
C) Insects and small animals
D) Fungi
E) Nectar
Answers with Explanations
1. C) Arthropoda
Arachnids are arthropods, characterized by jointed legs and an exoskeleton.
2. E) Centipede
Centipedes belong to the class Chilopoda, not Arachnida.
3. B) 4
Arachnids have 8 legs, which is 4 pairs.
4. C) Bilateral
Arachnids, like most animals, are bilaterally symmetrical.
5. C) Head
Arachnids have a fused head and thorax (cephalothorax), not a separate head.
6. A) None
Arachnids do not have antennae, unlike insects or crustaceans.
7. C) Defense and feeding
Chelicerae are often fangs or pincers used to grasp or inject venom.
8. C) Through book lungs or tracheae
Most arachnids use book lungs or tracheal systems for respiration.
9. D) Spinnerets
Spinnerets are specialized organs for silk production.
10. C) Blood or skin cells
Ticks and mites are parasitic and feed on fluids from hosts.
11. C) Scorpion
Scorpions are venomous and use a stinger located on their tail.
12. B) Two
Arachnids have a cephalothorax and abdomen.
13. D) They are mainly terrestrial
Most arachnids live on land, although a few mites live in water.
14. C) Capturing prey, mating, or sensory functions
Pedipalps vary in function, aiding in sensing, mating, and feeding.
15. C) Tick
Ticks are known vectors of Lyme disease, caused by Borrelia bacteria.
16. D) Chitinous exoskeleton
Arachnids, like all arthropods, have exoskeletons made of chitin.
17. C) Scorpion
Scorpions do not produce silk; spiders do.
18. D) Silk production and web spinning
Only spiders produce and use silk to build webs extensively.
19. D) Respiration
Book lungs are respiratory organs, allowing gas exchange.
20. C) Insects and small animals
Spiders are carnivorous and primarily eat insects.
- Compare arachnids with insects and other arthropods in classification lessons.
- Explore body structure and adaptations related to survival and predation.
- Discuss evolutionary biology using spiders and scorpions as examples.
- Apply biodiversity concepts in environmental science activities.
- Use anatomy and reproduction questions to reinforce zoology vocabulary.
- Create classroom discussions about ecosystem balance and food chains.
- Develop critical thinking through taxonomy and adaptation exercises.
- Use the material for biology reviews, STEM projects, and assessments.
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