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Bio I - Ch 23 Review
| Question | Answer |
|---|---|
| Cnidocytes help a cnidarian survive by | paralyzing prey. |
| Which of the following does NOT have a body divided into segments? | flukes |
| Both roundworms and rotifers have | complete digestive tracts. |
| An adult tapeworm uses its hooks and suckers to | attach itself to the intestinal wall of its host. |
| Organisms that spend their entire adult lives attached to one spot are said to be | sessile. |
| In an echinoderm, the structure that operates like a living suction cup is the | tube foot. |
| The Cambrian explosion was | a burst of animal diversity that occurred about 550 million years ago. |
| Which of the following groups of invertebrates are deuterostomes? | echinoderms |
| A key characteristic of multicellular organisms is [highly specialized cells, interdependent cells, multiple cell layers] | – all of the above |
| Mollusks have all of the following EXCEPT a [complete digestive tract, closed circulatory system, mantle, radula] | closed circulatory system. |
| A person who has trichinosis likely contracted it from | eating undercooked meat containing Trichinella cysts. |
| The fastest, most agile mollusks are the | cephalopods. |
| Filter feeding bivalves can be used to monitor the environmental health of a habitat because | The bivalves concentrate pollutants and microorganisms in their tissues. |
| The echinoderms that look like warty, moving pickles are | sea cucumbers. |
| Some type of body symmetry is found in all invertebrates EXCEPT | sponges. |
| Bilateral symmetry enables the | concentration of sense organs and nerve cells in the front of the body. |
| According to current hypotheses, this did NOT occur during the Cambrian explosion? | Animals evolved simpler body plans. |
| A “rotating wheel” of cilia surrounds the mouth of a | rotifer. |
| Hookworms, pinworms, and threadworms are examples of | roundworms |
| An echinoderm has an internal network of water | filled canals called the water vascular system.________________________ |
| Some sponges live on lake bottoms, while others are found on the seafloor. _________________________ | True |
| Annelids and mollusks, both of which possess a coelom, may be more closely related to each other than either is to flatworms or roundworms. _________________________ | True |
| Turbellaria is a class of parasitic flatworms. _________________________ | False, free living |
| Most sponges have two layers of cells. _________________________ | True |
| Animals that do not have backbones are called ____________________. | invertebrates |
| The life cycle of most cnidarians includes two body forms: medusas and ____________________. | polyps |
| The first branching point in a hypothetical phylogenetic tree of animal origins separates the sponges, which are animals that lack ____________________, from all other animals. | tissues |
| One hypothesis of animal origin is that animals evolved from _____________________ that lived as colonies of cells. | protists |
| The foot of most cephalopods is divided into eight or more arms called ____________________. | tentacles |
| The opening in the blastula is known as the ____________________. | blastopore |
| Most invertebrates that rely on rapid movement for survival have ____________________ symmetry. | bilateral |
| Cnidarians have a network of cells called a(an) ____________________ that enables them to respond to stimuli. | nerve net |
| Tiny animals called ____________________ are named for the whirlpool | producing cilia encircling their mouths. |
| The class of cnidarians that includes sea anemones and most coral animals is called ____________________. | Anthozo |
Created by:
tbillingsley
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