lecture 9

corals and anemones only has a ___ stage.

polyp

Anthozoans are ___ (corals) or sedentary (anemones).

sessile

What type of corals include sea fans & sea pens?

Soft corals

What is the function of the central gastrovascular cavity in cnidarians?

To digest food

What do anemones and some corals use to paralyze prey?

Nematocysts

What type of reproduction produces large colonies of identical hard corals?

Budding

What is the role of hard corals in the ecosystem?

Habitat formation

What do most cnidarians eat?

Plankton

What is the function of ctenes?

Locomotion

What type of symmetry do ctenophores have?

Radial

What is cephalization?

Concentration of sense organs at one end of animal

What type of organs do flatworms lack?

Circulatory and respiratory

What is the Class of free-living flatworms?

Tubellaria

What is the Class of parasitic tapeworms?

Cestoda

What do cestodes live in?

Host’s digestive tract

What is the intermediate host for trematodes?

Snail

What do ribbon worms use to capture prey?

Proboscis

What is the Phylum of ribbon worms?

Nemertea

What covers most molluscs?

CaCO3 shell

What is the Phylum of molluscs?

Mollusca

What is the mantle?

Protective tissue covering soft body

What is the radula?

Ribbon of tissue containing teeth

What type of circulatory system do molluscs have?

Open

What type of digestive system do molluscs have?

Complete

What is the Class of chitons?

Polyplacophora

What forms the 8 overlapping plates of chitons?

Mantle

Organisms that attach firmly to rocks and have flattened bodies are commonly found in the ___ zone.

intertidal

Large, flat foot

Key feature of organisms that attach firmly to rocks.

Organisms with flattened bodies and large, flat feet typically ___ algae & other organisms from rocks.

scrape

Flattened bodies

Characteristic of organisms that attach firmly to rocks.