Chapter 10

Write "true" for your answer. If a statement is incorrect, change the underlined expression to one that will make the statement true. A true body cavity is lined with mesodem.

Write "true" for your answer. If a statement is incorrect, change the underlined expression to one that will make the statement true. The dorsal region of the body is the under surface.

Write "true" for your answer. If a statement is incorrect, change the underlined expression to one that will make the statement true. Contractile proteins are associated with feeding.

Write "true" for your answer. If a statement is incorrect, change the underlined expression to one that will make the statement true. The Cnidaria are the first group to show tissue organization.

Budding is a form of ..4.. reproduction.

Write "true" for your answer. If a statement is incorrect, change the underlined expression to one that will make the statement true. Sponges have an external skeleton.

Needle-like crystals that make up the skeleton of a sponge are called ..6..

Write "true" for your answer. If a statement is incorrect, change the underlined expression to one that will make the statement true. The bowl shape of a jellyfish is known as an umbrella.

An organism that produces both egg and sperm is known as an ..7..

Write "true" for your answer. If a statement is incorrect, change the underlined expression to one that will make the statement true. The body form of Hydra is a polyp.

Write "true" for your answer. If a statement is incorrect, change the underlined expression to one that will make the statement true. The nerve net is associated with sponges.

Write "true" for your answer. If a statement is incorrect, change the underlined expression to one that will make the statement true. "Animal-flowers" refer to jellyfish.

Write "true" for your answer. If a statement is incorrect, change the underlined expression to one that will make the statement true. The function of flame cells is related to digestion.

Write "true" for your answer. If a statement is incorrect, change the underlined expression to one that will make the statement true. The head of a tapeworm is known as the proglottid.

Write "true" for your answer. If a statement is incorrect, change the underlined expression to one that will make the statement true. Annelids are round worms.

Write "true" for your answer. If a statement is incorrect, change the underlined expression to one that will make the statement true. Nereis is the genus name of the tapeworm.

Each tapeworm segment has a complete (a) digestive system (c) reproductive system (b) nervous system (d) locomotor organ

A true statement about Planaria is (a) Planaria are parasites. (b) Planaria lack powers of regeneration. (c) Planaria show the first signs of cephalization. (d) Planaria have segmented bodies.

Write "true" for your answer. If a statement is incorrect, change the underlined expression to one that will make the statement true. The most advanced phylum of invertebrates is Annelida.

The circulatory system of the annelid is (a) open (c) partly closed (b) closed (d) varying

The term metamerism refers to (a) male and female gonads in the same animal (b) a parasitic infestation of humans (c) an evolutionary trend in roundworms (d) a series of identical segments

The trochophore larva (a) is a fossil remnant (b) shows relationships between phyla (c) is part of the roundworm life cycle (d) has free-flowing pseudopods

A true statement about the earthworm is (a) Earthworms are self-fertilized. (b) The earthworm sexes are separate. (c) Earthworms copulate and exchange sperm. (d) Earthworms copulate and exchange eggs.

Cercaria larvae are best associated with (a) hydras (c) flukes (b) earthworms (d) jellyfish