Animal Classification Quiz

A body cavity lined by mesoderm.

An animal with a coelom.

Repetitive body parts in animals.

Animals with a body cavity not completely lined by mesoderm.

Animals without a body cavity.

Internal space separating the digestive tract from the body wall.

Middle germ layer in animal development.

A body cavity lined with mesoderm.

Animals with a coelom.

Animals with a pseudocoelom, not lined by mesoderm.

Animals without a body cavity.

Body division into repeating segments internally and externally.

Dorsal rod-like structure in some animals during development.

Animals with a notochord.

Animals without a notochord.

A phylum of aquatic animals, mostly marine, featuring radial symmetry and stinging cells (cnidocytes).

A specialized stinging cell found in Coelenterata, used for defense and capturing prey.

Sessile, cylindrical body form in Coelenterata, attached to a surface.

Free-swimming, umbrella-shaped body form in Coelenterata.

A single-opening body cavity for digestion in Coelenterata.

Life cycle with both polyp and medusa stages in Coelenterata.

Reproduction in Coelenterata, usually by budding, in polyp phase.

Body parts arranged around a central axis in Coelenterata.

Two germ layers create specialized tissues in Coelenterata.

Primitive multicellular marine animals with a water canal system for transport, food, respiration, and waste removal.

A network of channels in sponges that facilitates water flow, bringing in food and oxygen, and carrying out waste.

Tiny pores in a sponge's body wall where water enters.

Central cavity in a sponge where water is channeled.

Opening in a sponge where water exits.

Collar cells lining the spongocoel and canals in sponges; help in food capture.

Food digestion occurring inside sponge cells.

Supporting structures in sponges made of hard spicules or flexible spongin fibres.

A sponge where both eggs and sperm are produced by the same individual.

Sponges reproduce asexually by breaking into fragments which grow into new sponges.

Sponges reproduce sexually by the formation of eggs and sperm.

Sponge development with a larval stage distinct from the adult stage.