Echinoderm
Cnidaria
Arthropods
Porifera
100

This five-armed marine animal is a classic example of an echinoderm.


What is a sea star?

100

This cnidarian is famous for its painful sting and tentacles.


What is a jellyfish?


100

All arthropods have this hard outer covering.


What is an exoskeleton?


100

Porifera means

Pore bearing

200

Echinoderms move using this unique hydraulic system.


What is the water vascular system?

200

Cnidarians have these specialized stinging cells.


What are cnidocytes?


200

This group of arthropods includes ants, bees, and butterflies.

What are insects?

200

Sponges feed by drawing water through these small pores.


What are ostia?


300

This echinoderm can eject its internal organs as a defense mechanism.

What is a sea cucumber?

300

The two body forms of cnidarians are polyp and this.


What is medusa?


300

Arthropods grow by shedding their exoskeleton in this process.


What is molting


300

These cells with flagella create water currents in sponges.


What are choanocytes?


400

Echinoderms have this type of symmetry as adults.

What is radial symmetry?

400

Coral reefs are made from these cnidarians.


What are corals?


400

This marine arthropod is known for having a large claw.


What is a lobster


400

Sponges lack these three major features: tissues, organs, and this.


What is symmetry?


500

The skeleton of echinoderms is made of these mineral structures.


What are the head, thorax, and abdomen?


500

Cnidarians have this type of digestive system, with only one opening.


What is a gastrovascular cavity?


500

Arthropods have segmented bodies divided into these three main parts.


What are the head, and abdomen?


500

Sponges can reproduce both sexually and this way.


What is asexually?


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