Animal Phyla and Their Characteristics

Front

What is a Deuterostome?

Back

An animal whose first opening during gastrulation becomes the anus, while the second opening becomes the mouth. Examples include chordates and echinoderms.

Front

What are the key characteristics shared by all animals?

Back

Multicellular, eukaryotic, and heterotrophic.

Front

Which animal belongs to the phylum Echinodermata?

Back

Sea star.

Front

What is radial symmetry?

Back

A body plan in which body parts are arranged around a central axis, allowing for multiple planes of symmetry. Example: Hydra.

Front

Which phylum includes animals that do NOT undergo gastrulation?

Back

Porifera.

Front

What is the significance of gastrulation in animal development?

Back

Gastrulation is a crucial phase in embryonic development that leads to the formation of the three germ layers: ectoderm, mesoderm, and endoderm.

Front

Define the term 'coelomate'.

Back

An animal that possesses a true coelom, a fluid-filled body cavity completely surrounded by mesoderm.

Front

What is the difference between protostomes and deuterostomes?

Back

In protostomes, the mouth develops from the first opening, while in deuterostomes, the anus develops from the first opening.

Front

What are the main characteristics of phylum Cnidaria?

Back

Radial symmetry, presence of cnidocytes (stinging cells), and a body plan that includes a polyp or medusa form.

Front

Give an example of an animal from the phylum Annelida.

Back

Earthworm.