Question 1

Most spiders feed on _________________________.

Accepted Answer

The answer of Most spiders feed on _________________________....

Question 2

Discuss the importance of cuticular mechanoreceptors in the spiders.

Accepted Answer

Cuticular mechanoreceptors are an essent

Question 3

You could collect a sea spider

Accepted Answer

A) as an ectoparasite on a whale. 
B) grazing in kelp beds. 
C) from intertidal zones to over 6000 meters deep,especially in polar waters. 
D) as an endoparasite in the gut of echinoderms. 
E) in underwater webs in coral reefs. 
A) as an ectoparasite on a whale. 
B) grazing in kelp beds. 
C) from intertidal zones to over 6000 meters deep,especially in polar waters. 
D) as an endoparasite in the gut of echinoderms. 
E) in underwater webs in coral reefs.

Question 4

There are animal groups that have smaller individuals than arthropods and they have a few hundred or a few thousand species.And there are animal groups that contain much larger organisms,and they have a few hundred or a few thousand species.Why do the intermediate-sized arthropods have over a million species?

Accepted Answer

The incredible diversity of arthropods,

Question 5

Chelicerate arthropods possess

Accepted Answer

A) pedipalps. 
B) antennae. 
C) mandibles. 
D) three pairs of walking legs. 
E) All of the choices are chelicerate features. 
A) pedipalps. 
B) antennae. 
C) mandibles. 
D) three pairs of walking legs. 
E) All of the choices are chelicerate features.

Question 6

Why are the Opiliones considered to be in a clade with the scorpions and not so closely aligned with the Acari?

Accepted Answer

Opiliones, commonly known as harvestmen

Question 7

The arthropods

Accepted Answer

A) make up more than three-fourths of all the known species of animals. 
B) are more widely and more densely distributed throughout the world than members of any other phylum of animals. 
C) are segmented eucoelomate protostomes with well-developed organ systems. 
D) are limited in size and generally are smaller than 60 centimeters in length. 
E) All of the choices are correct. 
A) make up more than three-fourths of all the known species of animals. 
B) are more widely and more densely distributed throughout the world than members of any other phylum of animals. 
C) are segmented eucoelomate protostomes with well-developed organ systems. 
D) are limited in size and generally are smaller than 60 centimeters in length. 
E) All of the choices are correct.

Question 8

The arthropodan cuticle is not entirely hardened.Why not (think of the need to be mobile and flexible)?

Accepted Answer

The arthropodan cuticle, which is the ex

Question 9

Members of the class Arachnida have

Accepted Answer

A) a cephalothorax and abdomen. 
B) antennae. 
C) mandibles. 
D) five pairs of walking legs. 
E) All of the choices are arachnid features. 
A) a cephalothorax and abdomen. 
B) antennae. 
C) mandibles. 
D) five pairs of walking legs. 
E) All of the choices are arachnid features.

Question 10

Outline the apparent reasons why arthropods have achieved such incredible diversity and abundance.

Accepted Answer

There are several apparent reasons why a

Question 11

As the arthropod ancestors underwent "arthropodization,"

Accepted Answer

A) their circulatory system became closed. 
B) their hemocoel took on a new function as a hydrostatic skeleton. 
C) there was an expansion of surfaces for respiration and excretion. 
D) Intersegmental septa became unnecessary. 
E) a closed circulatory system became necessary. 
A) their circulatory system became closed. 
B) their hemocoel took on a new function as a hydrostatic skeleton. 
C) there was an expansion of surfaces for respiration and excretion. 
D) Intersegmental septa became unnecessary. 
E) a closed circulatory system became necessary.

Question 12

Discuss the ecological position of the spiders as a group.

Accepted Answer

Spiders play a crucial role in the ecosy

Question 13

Discuss the various functions of the exoskeleton.

Accepted Answer

The exoskeleton serves several important

Question 14

Arthropods are

Accepted Answer

A) carnivorous. 
B) herbivorous. 
C) omnivorous. 
D) both carnivorous and herbivorous. 
E) All of the choices are correct. 
A) carnivorous. 
B) herbivorous. 
C) omnivorous. 
D) both carnivorous and herbivorous. 
E) All of the choices are correct.

Question 15

What are the various uses for spider's silk?

Accepted Answer

Spider silk, known for its exceptional s

Question 16

How do spiders eat?

Accepted Answer

A) A spider mashes and manipulates food with its fangs so it can be swallowed whole. 
B) Food is soaked into silk threads which are then consumed. 
C) Food is partly digested externally and the nutritive juices are sucked into the stomach. 
D) Food is stored in a crop and ground up in a gizzard. 
E) Food is swallowed whole. 
A) A spider mashes and manipulates food with its fangs so it can be swallowed whole. 
B) Food is soaked into silk threads which are then consumed. 
C) Food is partly digested externally and the nutritive juices are sucked into the stomach. 
D) Food is stored in a crop and ground up in a gizzard. 
E) Food is swallowed whole.

Question 17

Pauropods lack

Accepted Answer

A) eyes. 
B) tracheae. 
C) a circulatory system. 
D) spiracles. 
E) All of the choices are lacking in pauropods. 
A) eyes. 
B) tracheae. 
C) a circulatory system. 
D) spiracles. 
E) All of the choices are lacking in pauropods.

Question 18

Arthropods are successful because they have

Accepted Answer

A) a very efficient respiratory system. 
B) highly developed sensory organs. 
C) reduced competition through metamorphosis. 
D) a protective exoskeleton that allows both protection and mobility. 
E) All of the choices are correct. 
A) a very efficient respiratory system. 
B) highly developed sensory organs. 
C) reduced competition through metamorphosis. 
D) a protective exoskeleton that allows both protection and mobility. 
E) All of the choices are correct.

Question 19

What makes the shell of a lobster so hard?

Accepted Answer

A) It contains chitin which is hard and inflexible. 
B) The procuticle is impregnated with calcium salts. 
C) It is due solely to a tanning process. 
D) The procuticle and epicuticle are laminated. 
E) The shell protein contains more lipid. 
A) It contains chitin which is hard and inflexible. 
B) The procuticle is impregnated with calcium salts. 
C) It is due solely to a tanning process. 
D) The procuticle and epicuticle are laminated. 
E) The shell protein contains more lipid.

Question 20

Horseshoe crabs

Accepted Answer

A) are,like their relatives the trilobites and eurypterids,now extinct. 
B) are poisonous to humans. 
C) live in freshwater habitats. 
D) have a long,spine-like telson. 
E) are adult forms of trilobites. 
A) are,like their relatives the trilobites and eurypterids,now extinct. 
B) are poisonous to humans. 
C) live in freshwater habitats. 
D) have a long,spine-like telson. 
E) are adult forms of trilobites.

Exam 19: Trilobites, Chelicerates, and Myriapods

Most spiders feed on _________________________.

Discuss the importance of cuticular mechanoreceptors in the spiders.

You could collect a sea spider

Chelicerate arthropods possess

Why are the Opiliones considered to be in a clade with the scorpions and not so closely aligned with the Acari?

The arthropods

The arthropodan cuticle is not entirely hardened.Why not (think of the need to be mobile and flexible)?

Members of the class Arachnida have

Outline the apparent reasons why arthropods have achieved such incredible diversity and abundance.

As the arthropod ancestors underwent "arthropodization,"

Discuss the ecological position of the spiders as a group.

Discuss the various functions of the exoskeleton.

Arthropods are

What are the various uses for spider's silk?

How do spiders eat?

Pauropods lack

Arthropods are successful because they have

What makes the shell of a lobster so hard?

Horseshoe crabs

Life: Biological Principles and the Science of Zoology

The Origin and Chemistry of Life

Cells As Units of Life

Cellular Metabolism

Genetics: a Review

Organic Evolution

The Reproductive Process

Principles of Development

Architectual Pattern of an Animal

Taxonomy and Phylogeny of Animals

Unicellular Eukaryotes

Sponges and Placozoans

Cnidarians and Ctenophores

Acoelomorpha, Platyzoa, and Mesozoa

Polyzoa and Kryptrochozoa

Molluscs

Annelids and Allied Taxa

Smaller Ecdysozoans

Crustaceans

Hexapods

Chaetognaths, echinoderms, and Hemichordates

Chordates

Fishes

Early Tetrapods and Modern Amphibians

Amniote Origins and Nonavian Reptiles

Birds

Mammals

Support, Protection, and Movement

Homeostasis: Osmotic Regulation, Excretion, and Temperature Regulation

Homeostasis: Internal Fluids and Respiration

Digestion and Nutrition

Nervous Coordination: Nervous System and Sense Organs

Chemical Coordination: Endocrine System

Immunity

Animal Behavior

Animal Distribution

Animal Ecology

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