Question 1

The term "trimerous" or "tripartite" refers to

Accepted Answer

A)  the three lophophorate groups. 
B)  division of the coelom into three parts. 
C)  the pattern of egg cleavage. 
D)  the three forms of trochophore larvae. 
E)  layers in the brachiopod shell. 
A)  the three lophophorate groups. 
B)  division of the coelom into three parts. 
C)  the pattern of egg cleavage. 
D)  the three forms of trochophore larvae. 
E)  layers in the brachiopod shell.

Question 2

Statoblasts are usually formed

Accepted Answer

A)  in the winter. 
B)  in the spring. 
C)  in freshwater ectoprocts. 
D)  anytime the pools begin to dry up. 
E)  when the colony ages. 
A)  in the winter. 
B)  in the spring. 
C)  in freshwater ectoprocts. 
D)  anytime the pools begin to dry up. 
E)  when the colony ages.

Question 3

The fossil record of brachiopods shows

Accepted Answer

A)  they have only recently branched off from molluscan bivalves. 
B)  they have existed nearly unchanged in design since the Ordovician times. 
C)  they have evolved rapidly to displace many molluscs. 
D)  they have never been common and are now going extinct. 
E)  they are now much bigger than they were in earlier times. 
A)  they have only recently branched off from molluscan bivalves. 
B)  they have existed nearly unchanged in design since the Ordovician times. 
C)  they have evolved rapidly to displace many molluscs. 
D)  they have never been common and are now going extinct. 
E)  they are now much bigger than they were in earlier times.

Exam 15: Polyzoa and Kryptrochozoa

The term "trimerous" or "tripartite" refers to

Statoblasts are usually formed

The fossil record of brachiopods shows

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

Molluscs

Annelids and Allied Taxa

Smaller Ecdysozoans

Trilobites, Chelicerates, and Myriapods

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

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