U6 Invertebrates

Front

What is the largest phylum of invertebrates?

Back

Arthropoda

Front

To which phylum do roundworms belong?

Back

Nematoda

Front

What type of pressure is exerted by the antagonistic action of circular and longitudinal muscles in an earthworm?

Back

Hydrostatic pressure

Front

What are the spicules of calcareous sponges made of?

Back

Calcium carbonate

Front

What kind of symmetry does a Cnidarian exhibit?

Back

Radial Symmetry

Front

Define 'invertebrates'.

Back

Animals that lack a backbone.

Front

What are the main characteristics of the phylum Mollusca?

Back

Soft-bodied animals, often with a hard shell, including snails and octopuses.

Front

What is the function of spicules in sponges?

Back

Provide structural support and deter predators.

Front

What is the primary habitat of most invertebrates?

Back

Aquatic environments, though many also inhabit terrestrial ecosystems.

Front

What is the significance of hydrostatic skeletons in invertebrates?

Back

They provide support and enable movement through fluid pressure.