Question 1

Most spiders feed on _________________________.

Accepted Answer

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

Question 2

Arthropodan cephalization is pronounced.Would this have anything to do with tagmatization? If an organism is highly cephalized does it always exhibit tagmatization? If an organism exhibits tagmatization,is it always highly cephalized?

Accepted Answer

Arthropodan cephalization refers to the

Question 3

Which arachnid has a bite or sting that is neurotoxic and causes paralysis?

Accepted Answer

A)  Scorpion 
B)  Brown recluse spider 
C)  Black widow spider 
D)  All arachnids have such a toxin and are dangerous if large enough to bite us 
E)  No arachnid has a dangerous neurotoxic bite 
A)  Scorpion 
B)  Brown recluse spider 
C)  Black widow spider 
D)  All arachnids have such a toxin and are dangerous if large enough to bite us 
E)  No arachnid has a dangerous neurotoxic bite

Question 4

Scorpions

Accepted Answer

A)  feed during the day. 
B)  are most common in the temperate areas of the world. 
C)  are docile animals that, in spite of their reputation, cannot harm humans. 
D)  are sensitive to surface waves produced by movement on the ground. 
E)  All of the choices are correct. 
A)  feed during the day. 
B)  are most common in the temperate areas of the world. 
C)  are docile animals that, in spite of their reputation, cannot harm humans. 
D)  are sensitive to surface waves produced by movement on the ground. 
E)  All of the choices are correct.

Question 5

Discuss the ecological position of the spiders as a group.

Accepted Answer

Spiders play a crucial role in the ecosy

Question 6

Spiders and insects have an excretory system composed of

Accepted Answer

A)  permeable surface cuticle. 
B)  enclosed book lungs. 
C)  flame cells. 
D)  green glands. 
E)  malpighian tubules. 
A)  permeable surface cuticle. 
B)  enclosed book lungs. 
C)  flame cells. 
D)  green glands. 
E)  malpighian tubules.

Question 7

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 8

Spider silk

Accepted Answer

A)  is very strong but cannot be stretched without breaking. 
B)  is only produced by those orb web spiders that form webs to catch insects. 
C)  is formed as solid coiled threads internally that can be uncoiled and used whenever needed. 
D)  is used differently by different spider species. 
E)  All of the choices are correct. 
A)  is very strong but cannot be stretched without breaking. 
B)  is only produced by those orb web spiders that form webs to catch insects. 
C)  is formed as solid coiled threads internally that can be uncoiled and used whenever needed. 
D)  is used differently by different spider species. 
E)  All of the choices are correct.

Question 9

Discuss the importance of cuticular mechanoreceptors in the spiders.

Accepted Answer

Cuticular mechanoreceptors are an essent

Question 10

Discuss the various functions of the exoskeleton.

Accepted Answer

The exoskeleton serves several important

Question 11

Describe the bite of the chigger mite.How long are the nymphs actually attached,and why is it that some people have such intense reactions to their bites yet others have none?

Accepted Answer

The bite of the chigger mite, also known

Question 12

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 13

There is a hypothesis that euryterid predation on early fish induced the selection for armor in these vertebrates.What kind of evidence would you require to show that there might be a causation here,rather than just a correlation in the fossil record?

Accepted Answer

To demonstrate causation rather than jus

Question 14

The Acari

Accepted Answer

A)  have a distinct head, thorax, and abdomen. 
B)  are of great economic and medical importance. 
C)  are a limited and well known order of about 2,000 species. 
D)  are all terrestrial. 
E)  All of the choices are correct. 
A)  have a distinct head, thorax, and abdomen. 
B)  are of great economic and medical importance. 
C)  are a limited and well known order of about 2,000 species. 
D)  are all terrestrial. 
E)  All of the choices are correct.

Question 15

Which is NOT a correct association of scorpion structures and functions?

Accepted Answer

A)  Pectines-tactile organs to explore the ground 
B)  Spermatophore-a packet of sperm 
C)  Chelicerae-large six-jointed pincers 
D)  Cephalothorax-bears the appendages 
E)  Postabdomen-bears a tail with sting 
A)  Pectines-tactile organs to explore the ground 
B)  Spermatophore-a packet of sperm 
C)  Chelicerae-large six-jointed pincers 
D)  Cephalothorax-bears the appendages 
E)  Postabdomen-bears a tail with sting

Question 16

What are the various uses for spider's silk?

Accepted Answer

Spider silk, known for its exceptional s

Question 17

Spiders breathe by means of

Accepted Answer

A)  gills. 
B)  diffusion across the soft cuticle. 
C)  an extensive system of tracheae more complex than is found in insects. 
D)  book lungs or primitive tracheae. 
E)  coxal glands. 
A)  gills. 
B)  diffusion across the soft cuticle. 
C)  an extensive system of tracheae more complex than is found in insects. 
D)  book lungs or primitive tracheae. 
E)  coxal glands.

Question 18

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 19

Another name for the harvestman is ________ ________.

Accepted Answer

The answer of Another name for the harvestman is ________...

Question 20

Two poisonous spiders in the United States that are dangerous to humans are the black widow and the ______ _______.

Accepted Answer

The answer of Two poisonous spiders in the United States...

Exam 19: Trilobites, Chelicerates, and Myriapods

Most spiders feed on _________________________.

Arthropodan cephalization is pronounced.Would this have anything to do with tagmatization? If an organism is highly cephalized does it always exhibit tagmatization? If an organism exhibits tagmatization,is it always highly cephalized?

Which arachnid has a bite or sting that is neurotoxic and causes paralysis?

Scorpions

Discuss the ecological position of the spiders as a group.

Spiders and insects have an excretory system composed of

You could collect a sea spider

Spider silk

Discuss the importance of cuticular mechanoreceptors in the spiders.

Discuss the various functions of the exoskeleton.

Describe the bite of the chigger mite.How long are the nymphs actually attached,and why is it that some people have such intense reactions to their bites yet others have none?

Members of the class Arachnida have

There is a hypothesis that euryterid predation on early fish induced the selection for armor in these vertebrates.What kind of evidence would you require to show that there might be a causation here,rather than just a correlation in the fossil record?

The Acari

Which is NOT a correct association of scorpion structures and functions?

What are the various uses for spider's silk?

Spiders breathe by means of

As the arthropod ancestors underwent "arthropodization,"

Another name for the harvestman is ________ ________.

Two poisonous spiders in the United States that are dangerous to humans are the black widow and the ______ _______.

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

Architectural Pattern of an Animal

Taxonomy and Phylogeny of Animals

Unicellular Eukaryotes

Sponges and Placozoans

Radiate Animals

Acoelomorpha,Platyzoa,and Mesozoa

Polyzoa and Kryptrochozoa

Molluscs

Annelids and Allied Taxa

Smaller Ecdysozoans

Crustaceans

Support, Protection, and Movement

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 Distributions

Animal Ecology

Filters

Another name for the harvestman is .

Two poisonous spiders in the United States that are dangerous to humans are the black widow and the _.