Question 1

A scolex is

Accepted Answer

A) the anterior attachment organ of a tapeworm. 
B) the feeding organ of a fluke. 
C) an appendage of a sandworm. 
D) the egg of a sea star. 
E) the larva of an aquatic insect. 
A) the anterior attachment organ of a tapeworm. 
B) the feeding organ of a fluke. 
C) an appendage of a sandworm. 
D) the egg of a sea star. 
E) the larva of an aquatic insect.

Question 2

Which of the following describe(s) conotoxins?

Accepted Answer

A) up to 300 different types 
B) delivered by a harpoon-like device 
C) very specific effects 
D) affect membrane proteins 
E) all of these 
A) up to 300 different types 
B) delivered by a harpoon-like device 
C) very specific effects 
D) affect membrane proteins 
E) all of these

Question 3

Which of the following has a gut with two openings, a mouth, and an anus?

Accepted Answer

A) cnidarians 
B) annelids 
C) flatworms 
D) sponges 
E) placozoans 
A) cnidarians 
B) annelids 
C) flatworms 
D) sponges 
E) placozoans

Question 4

Four of the five features listed below are characteristic of cnidarians.Select the exception.

Accepted Answer

A) planula larvae 
B) polyp form 
C) mesoglea 
D) nematocyst 
E) esophagus 
A) planula larvae 
B) polyp form 
C) mesoglea 
D) nematocyst 
E) esophagus

Question 5

Tissues derived from mesoderm are absent in

Accepted Answer

A) sponges. 
B) cnidarians. 
C) flatworms. 
D) sponges and cnidarians. 
E) sponges, cnidarians, and flatworms. 
A) sponges. 
B) cnidarians. 
C) flatworms. 
D) sponges and cnidarians. 
E) sponges, cnidarians, and flatworms.

Question 6

The first phylum with three germ layers is

Accepted Answer

A) Cnidaria. 
B) Platyhelminthes. 
C) Annelida. 
D) Arthropoda. 
E) Nematoda. 
A) Cnidaria. 
B) Platyhelminthes. 
C) Annelida. 
D) Arthropoda. 
E) Nematoda.

Question 7

Which of the following is NOT a chelicerate?

Accepted Answer

A) tick 
B) mosquito 
C) spider 
D) horseshoe crab 
E) scorpion 
A) tick 
B) mosquito 
C) spider 
D) horseshoe crab 
E) scorpion

Question 8

Which phylum is strictly marine with no freshwater or terrestrial forms?

Accepted Answer

A) Echinodermata 
B) Platyhelminthes 
C) Cnidaria 
D) Mollusca 
E) Annelida 
A) Echinodermata 
B) Platyhelminthes 
C) Cnidaria 
D) Mollusca 
E) Annelida

Question 9

Which of the following is mismatched?

Accepted Answer

A) sponges; gemmules 
B) cnidarians; polyp 
C) nematodes; segmentation 
D) flatworms; flame cell 
E) tapeworms; scolex 
A) sponges; gemmules 
B) cnidarians; polyp 
C) nematodes; segmentation 
D) flatworms; flame cell 
E) tapeworms; scolex

Question 10

Use the figure above to answer questions 
  
-A body plan of all coelomates is indicated by

Accepted Answer

A) A. 
B) B. 
C) C. 
D) all of these. 
E) none of these. 
A) A. 
B) B. 
C) C. 
D) all of these. 
E) none of these.

Question 11

All but which are true about conotoxins?

Accepted Answer

A) They are potential sources of many new drugs of medical interest. 
B) They are made by snails inhabiting the South Pacific Ocean. 
C) One blocks pain as does morphine but is nonaddictive. 
D) They are not lethal to cone snail prey. 
E) They disrupt signals flowing through their nervous system. 
A) They are potential sources of many new drugs of medical interest. 
B) They are made by snails inhabiting the South Pacific Ocean. 
C) One blocks pain as does morphine but is nonaddictive. 
D) They are not lethal to cone snail prey. 
E) They disrupt signals flowing through their nervous system.

Question 12

Torsion of the adult body is characteristic of

Accepted Answer

A) mollusks in general. 
B) gastropods. 
C) bivalves. 
D) squids. 
E) none of these. 
A) mollusks in general. 
B) gastropods. 
C) bivalves. 
D) squids. 
E) none of these.

Question 13

The water-vascular system is used primarily for

Accepted Answer

A) excretion of excess water. 
B) locomotion. 
C) respiration. 
D) circulation. 
E) sensing the environment. 
A) excretion of excess water. 
B) locomotion. 
C) respiration. 
D) circulation. 
E) sensing the environment.

Question 14

Barnacles are

Accepted Answer

A) parasites. 
B) herbivores. 
C) predators. 
D) filter feeders. 
E) all of these. 
A) parasites. 
B) herbivores. 
C) predators. 
D) filter feeders. 
E) all of these.

Question 15

Which of the following is NOT found in most spiders?

Accepted Answer

A) eyes 
B) silk glands 
C) tracheae 
D) poison glands 
E) chelicerae 
A) eyes 
B) silk glands 
C) tracheae 
D) poison glands 
E) chelicerae

Question 16

An animal with bilateral symmetry

Accepted Answer

A) has left and right sides. 
B) usually displays cephalization. 
C) produces mirror images regardless of the number of "cuts" through the central axis. 
D) has left and right sides and usually displays cephalization. 
E) has left and right sides, usually displays cephalization, and produces mirror images regardless of the number of "cuts" through the central axis. 
A) has left and right sides. 
B) usually displays cephalization. 
C) produces mirror images regardless of the number of "cuts" through the central axis. 
D) has left and right sides and usually displays cephalization. 
E) has left and right sides, usually displays cephalization, and produces mirror images regardless of the number of "cuts" through the central axis.

Question 17

The water-vascular system is unique to

Accepted Answer

A) cnidarians. 
B) bivalves. 
C) echinoderms. 
D) annelids. 
E) arthropods. 
A) cnidarians. 
B) bivalves. 
C) echinoderms. 
D) annelids. 
E) arthropods.

Question 18

During extended periods of dehydration, tardigrades

Accepted Answer

A) enter suspended animation. 
B) migrate to the soil subsurface. 
C) enter small ponds and lakes. 
D) climb inside a plant leaf and encyst. 
E) none of these 
A) enter suspended animation. 
B) migrate to the soil subsurface. 
C) enter small ponds and lakes. 
D) climb inside a plant leaf and encyst. 
E) none of these

Question 19

The mollusk group that includes the fastest, largest, and smartest invertebrates is the

Accepted Answer

A) chitons. 
B) cephalopods. 
C) gastropods. 
D) bivalves. 
E) nudibranchs. 
A) chitons. 
B) cephalopods. 
C) gastropods. 
D) bivalves. 
E) nudibranchs.

Question 20

Immature forms of insects generally specialize in

Accepted Answer

A) eating and growing fast. 
B) reproduction. 
C) caring for the adults. 
D) dispersal. 
E) flying. 
A) eating and growing fast. 
B) reproduction. 
C) caring for the adults. 
D) dispersal. 
E) flying.

Exam 25: Animals: the Invertebrates

A scolex is

Which of the following describe(s) conotoxins?

Which of the following has a gut with two openings, a mouth, and an anus?

Four of the five features listed below are characteristic of cnidarians.Select the exception.

Tissues derived from mesoderm are absent in

The first phylum with three germ layers is

Which of the following is NOT a chelicerate?

Which phylum is strictly marine with no freshwater or terrestrial forms?

Which of the following is mismatched?

Use the figure above to answer questions -A body plan of all coelomates is indicated by

All but which are true about conotoxins?

Torsion of the adult body is characteristic of

The water-vascular system is used primarily for

Barnacles are

Which of the following is NOT found in most spiders?

An animal with bilateral symmetry

The water-vascular system is unique to

During extended periods of dehydration, tardigrades

The mollusk group that includes the fastest, largest, and smartest invertebrates is the

Immature forms of insects generally specialize in

Invitation to Biology

Lifes Chemical Basis

Molecules of Life

Cell Structure and Function

A Closer Look at Cell Membranes

Ground Rules of Metabolism

Where It Startsphotosynthesis

Energy-Releasing Pathways

How Cells Reproduce

Meiosis and Sexual Reproduction

Observing Patterns in Inherited Traits

Chromosomes and Human Inheritance

Dna Structure and Function

From Dna to Protein

Controls Over Genes

Recombinant Dna and Genetic Engineering

The Macroevolutionary Puzzle

Emergence of Evolutionary Thought

Organizing Information About Species

The Origin and Evolution of Life

Viruses and Prokaryotes

Protists the Simplest Eukaryotes

Plants

Fungi

Animal Evolution the Chordates

Human Evolution: a Case Study

Plant Tissues

Plant Nutrition and Transport

Plant Reproduction

Plant Growth and Development

Animal Tissues and Organ Systems

Neural Control

Sensory Perception

Endocrine Control

Protection, Support, and Movement

Circulation

Immunity

Respiration

Digestion and Human Nutrition

Maintaining the Internal Environment

Animal Reproductive Systems

Animal Development

Animal Behavior

Population Ecology

Community Structure and Biodiversity

Ecosystems

The Biosphere

Human Impacts on the Biosphere

Filters