Invertebrate Phyla Characteristics

This video from Mumu Math and Science introduces invertebrates, animals without a backbone. It covers eight phyla: Porifera (sponges), Cnidaria (jellyfish), Platyhelminthes (flatworms), Nematoda (roundworms), Annelida (segmented worms), Arthropoda (insects and arachnids), Mollusca (snails and octopuses), and Echinodermata (starfish). Each phylum's characteristics and examples are briefly discussed. The video concludes with a mention of more detailed videos available for each phylum.

What is a common characteristic of all invertebrates?

• They are all parasitic.

• They have a backbone.

• They lack a spinal cord.

• They live only in water.

Which phylum is known for organisms with pores and filter-feeding capabilities?

• Porifera

• Cnidaria

• Mollusca

• Arthropoda

What is a notable feature of Cnidarians?

• They have a hard shell.

• They possess stinging cells.

• They are segmented worms.

• They have an exoskeleton.

Which phylum includes flatworms, such as tapeworms?

• Nematoda

• Annelida

• Platyhelminthes

• Echinodermata

What is a characteristic of nematodes?

• They possess stinging cells.

• They have threadlike round bodies.

• They are filter feeders.

• They have a segmented body.

Which phylum includes earthworms?

• Annelida

• Mollusca

• Cnidaria

• Arthropoda

What is a defining feature of arthropods?

• They have stinging cells.

• They have a soft body.

• They have an exoskeleton.

• They are filter feeders.

Which phylum includes organisms with a soft body, often with a shell?

• Porifera

• Echinodermata

• Mollusca

• Nematoda

What is a characteristic of echinoderms?

• They have an exoskeleton.

• They are parasitic.

• They have spines all over their body.

• They have a segmented body.

Which of the following is an example of a mollusk?

• Starfish

• Earthworm

• Snail

• Jellyfish