Echinoderm Biology Quiz

Challenge yourself with 16 questions on echinoderms. Explore their anatomy, behaviors, and unique adaptations. How much do you know?

#1

Which of the following is not a characteristic of echinoderms?

Radial symmetry
Bilateral symmetry
Endoskeleton made of calcareous plates
Water vascular system
1 answered
#2

What is the water vascular system in echinoderms primarily used for?

Respiration
Locomotion
Digestion
Reproduction
1 answered
#3

Which echinoderm class includes species with pentaradial symmetry?

Asteroidea
Ophiuroidea
Echinoidea
Holothuroidea
1 answered
#4

What unique feature do sea stars (Asteroidea) use for feeding?

Tube feet
Madreporite
Aristotle's lantern
Pedicellariae
1 answered
#5

Which echinoderm class is known for their long, snake-like arms?

Asteroidea
Echinoidea
Ophiuroidea
Holothuroidea
1 answered
#6

What is the primary function of pedicellariae in echinoderms?

Respiration
Protection against predators
Locomotion
Reproduction
1 answered
#7

Which of the following echinoderms has a spherical body covered in spines?

Sea cucumber
Brittle star
Sea urchin
Sea lily
1 answered
#8

What is the term for the tiny, fluid-filled structures found in the tube feet of echinoderms?

Ampullae
Podia
Madreporite
Pedicellariae
#9

Which echinoderm class is characterized by a pentamerous radial symmetry?

Asteroidea
Echinoidea
Ophiuroidea
Holothuroidea
#10

Which echinoderm class exhibits a flattened, disk-like body shape?

Asteroidea
Echinoidea
Ophiuroidea
Holothuroidea
#11

What is the function of the madreporite in echinoderms?

Reproduction
Respiration
Excretion
Water filtration into the water vascular system
#12

Which echinoderm class is characterized by a long, flexible body with a leathery skin?

Asteroidea
Echinoidea
Ophiuroidea
Holothuroidea
#13

Which echinoderm class is commonly referred to as 'sea lilies'?

Asteroidea
Echinoidea
Ophiuroidea
Crinoidea
#14

What is the scientific name for the unique feeding structure found in sea urchins?

Tube feet
Aristotle's lantern
Pedicellariae
Madreporite
#15

What is the function of the ampullae in echinoderms?

Respiration
Locomotion
Feeding
Water storage
#16

Which echinoderm class is characterized by a soft, elongated body with a reduced endoskeleton?

Asteroidea
Echinoidea
Ophiuroidea
Holothuroidea

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