Animals & Lophotrochozoans Flashcards 10

Flashcards based on lecture notes about Animals and Lophotrochozoans, focusing on key characteristics, classifications, and examples within different phyla.

Animals are eukaryotes and .

Multicellular eukaryotes that ingest their own food.

Different animal phyla are characterized by such traits as __.

Body symmetry, number of embryonic tissue layers, presence/absence of a body cavity, and patterns of early embryonic development.

__ are an example of animals with asymmetry.

Sponges.

__ are an example of animals with radial symmetry.

Sea anemones.

__ are an example of animals with bilateral symmetry.

Lizards.

The ectoderm embryonic germ layer gives rise to __.

Skin and nervous system.

The mesoderm embryonic germ layer gives rise to __.

Muscles, connective tissue, skeleton, kidneys, circulatory and reproductive organs.

The endoderm embryonic germ layer forms __.

The lining of the gut and major organs derived from it.

During fertilization, __.

Sperm and egg unite to form a diploid zygote.

Gametes are produced within __.

Gonads (testes and ovaries).

The remaining phyla are grouped into two categories based on their embryonic development: __.

Protostomes and deuterostomes.

Porifera (sponges) __.

Lack tissues, organs, and organ systems.

Water enters the sponge through pores called __.

Ostium.

Water exits the sponge through the large opening at the tip of the sponge called __.

Osculum.

Flagellated cells called __ create a current to draw water into a sponge.

Collar cells (Choanocytes).

Examples of Cnidaria are __.

Coral, jellyfish, sea anemones.

Cnidaria exhibit __.

Radial symmetry.

Cnidarians have two variations on body plan: __.

Sessile polyp and motile medusa.

Cephalization is __.

Accumulation of a nervous system (a brain and eyes) at the head of the animal.

The Lophotrochozoa lineage includes __.

Platyhelminthes, Annelida, and Mollusca.

The common name for Platyhelminthes is __.

Flatworms.

Examples of Annelida are __.

Earthworms, leeches, and polychaete worms.

Metameric (segmented) means __.

Body divided into individual, repeating segments.

Annelida feature a __.

Complete, one-way digestive tract.

The main groups of Mollusca are __.

Chitons, gastropods, bivalves, and cephalopods.

A radula is __.

A tongue-like structure with rows of teeth.