Exam 31: Animal Phylogeny, Acoelomates, and Protostomes

Asymmetry, choanocytes, filter feeding, osculum, and spicules are all terms associated with which phylum?

Members of the phyla Ectoprocta, Brachiopoda, and Phoronida all possess a lophophore, which is a(n) ____.

The beating flagellae of ____ maintain a constant flow of water through sponges.

Members of the phylum ____ exhibit radial symmetry, with their body parts arranged regularly around a central axis.

Chitin-reinforced bristles that protrude outward from the body wall and are used by most segmented worms to anchor themselves against a substrate are called ____.

Members of the ____ lineage, commonly called chitons, have a dorsal shell divided into eight plates that allow it to conform to irregularly shaped surfaces.

How does embryonic cleavage differ in protostomes and deuterostomes?

Found mostly in freshwater, members of the ____ Lophotrochozoan phylum have a wheel-like, ciliated food-gathering organ around their head called a corona, and some reproduce by parthenogenesis.

In sponges, spicules are ____.

Most members of the ____ Cnidarian lineage, including Obelia species, have both polyp and medusa stages in their life cycles, with the polyp stage typically forming a colony.

In deuterostomes, early embryos undergo ____ cleavage.

Which animal taxon is named for the cuticle or external skeleton that its members secrete and periodically molt?

Which phylum is a member of the Radiata clade?

Members of the____ phylum have radial symmetry, and use their two tentacles to capture prey. They have eight longitudinal plates of cilia that they use for movement, making them the largest animals to use cilia as their primary means of locomotion.

Species in the ____ Lophotrochozoan phylum have a body divided into three regions: visceral mass, head-foot, and mantle.

An insect whose larval and adult forms occupy different habitats and consume different food probably undergoes ____ metamorphosis.

Paired, fleshy extensions of the body wall in bristle worms that are used for locomotion and gas exchange are called ____.

Members of the ____ lineage, known as leeches, are mostly freshwater parasites, are dorsoventrally flattened, and do not have septa.