Echinoderm webquest

Echinodermata is a Latin word meaning

• spiny skinned

• soft bodied

• hard shelled

• smooth skinned

Echinoderms are characterized by

• radial symmetry

• bilateral symmetry

• asymmetry

• spiral symmetry

Echinoderms have no

• heart, brain, or eyes

• lungs, liver, or kidneys

• stomach, intestines, or bladder

• bones, muscles, or skin

Echinoderms have tentacle-like structures called __________ with suction pads on them

• Tube feet

• Tentacles

• Arms

• Cnidocytes

Echinoderms use the tube feet for their method of locomotion. The tube feet are controlled by absorbing or expelling water through the use of

• a vascular system

• a nervous system

• a muscular system

• a skeletal system

What two animals are the primary predators of the crown of thorns?

• Giant triton shell and puffer fish

• Sea cucumbers and brittle stars

• Soft corals and anemones

• Feather stars and sea urchins

What special feature do feather stars have on their arms to help them catch prey?

• The arms, called pinnules, are coated with a sticky substance

• The arms are brightly colored

• The arms are very long

• The arms have sharp spikes

Why are echinoderms host to various symbiotic animals?

• Animals receive shelter and food (left over) and also feed on microorganisms living on feather stars

• Echinoderms provide warmth

• Echinoderms have a hard shell

• Echinoderms are colorful

Which of the echinoderms is the fastest moving?

• Brittle stars

• Sea urchins

• Sea cucumbers

• Feather stars

Sea urchins tend to have great camouflage because they sometimes carry what two animals on their shells?

• Soft corals and anemones

• Brittle stars and feather stars

• Sea cucumbers and puffer fish

• Giant triton shell and sea stars