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33 terms

CDel3

Biology 1407 Chapter 33

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The animal phylum most like the protists that gave rise to the animal kingdom is _____.

Lycophyta
Porifera
Echinodermata
Ctenophora
Cnidaria

Porifera
One should expect to find cilia associated with the feeding apparatus of _____.

sponges
annelids
coral animals
tapeworms

sponges
Sponges _____.

-have feeding cells called dinoflagellates
-have a nerve net but not a central nervous system
-have larvae which are motile and move via the motion of cilia
-are the simplest diploblastic animals

have larvae which are motile and move via the motion of cilia
Which of the following is most likely to be aquatic?

fluid feeder
suspension feeder
deposit feeder
mass feeder

suspension feeder
Comb jellies may not be the most familiar animal to you, but they are critical in the food chain because they make up a significant portion of the planktonic biomass. Their feeding strategy is predatory and involves adhesives or mucus on their tentacles or other body parts. What feeding tactic do these animals use?

food-mass feeder
suspension feeder
deposit feeder
fluid feeder

suspension feeder
Which of the following can be found in the mesohyl of a sponge?
1. amoebocytes
2. spicules
3. spongin
4. zygotes
5. choanocytes

-2, 3, 4
-1, 2, 3, 4, and 5
-1, 2, 3, and 4
-1 and 2

1, 2, 3, and 4
Which of the following is a characteristic of cnidarians?

radula
bilateral symmetry
an anus
gastrovascular cavity
mesoderm

gastrovascular cavity
Most cnidarians are known to produce toxins. In fact, it has been claimed that one particular species produces the most deadly of all toxins on the planet. What feature of this group most likely evolved simultaneously with the evolution of these toxins?

-the medusa body form
-asexual reproduction
-a slow-moving or sessile lifestyle in the adult
-diploblastic design

a slow-moving or sessile lifestyle in the adult
terms of food capture, which sponge cell is most similar to the cnidocyte of a cnidarian?

choanocyte
epidermal cell
amoebocyte
pore cell

choanocyte
An elementary school science teacher decided to liven up the classroom with a saltwater aquarium. Knowing that saltwater aquaria can be quite a hassle, the teacher proceeded stepwise. First, the teacher conditioned the water. Next, the teacher decided to stock the tank with various marine invertebrates, including a polychaete, a siliceous sponge, several bivalves, a shrimp, several sea anemones of different types, a colonial hydra, a few coral species, an ectoproct, a sea star, and several herbivorous gastropod varieties. Lastly, she added some vertebrates-a parrotfish and a clownfish. She arranged for daily feedings of copepods and feeder fish.

One day, Tommy, a student in an undersupervised class of forty fifth graders, got the urge to pet Nemo (the clownfish), who was swimming among the waving petals of a pretty underwater "flower" that had a big hole in the midst of the petals. Tommy giggled upon finding that these petals felt sticky. A few hours later, Tommy was in the nurse’s office with nausea and cramps. Microscopic examination of his fingers would probably have revealed the presence of _____.

-teeth marks
-nematocysts
-spicules
-spines

nematocysts
Which of the following is characteristic of the phylum Platyhelminthes?

They are all parasitic.
They are radially symmetrical.
They are diploblastic.
They are dorsoventrally flattened.
They typically reproduce asexually.

They are dorsoventrally flattened.
Ectoprocts and brachiopods are collectively referred to as _____.

lophophorates
ecdysozoans
trochophorates
eumetazoans
flatworms

lophophorates
Members of the phylum Mollusca _____.

-have tentacles surrounding a central mouth/anus
-are filter feeders
-are soft-bodied and often covered by a shell
-have segmented bodies and paired, jointed appendages
-have closed circulatory systems

are soft-bodied and often covered by a shell
Which of the following is true of annelids?

They have a nerve net.
They have pseudocoeloms.
They have a gastrovascular cavity.
They have an open circulatory system.
They perform gas exchange across their skin.

They perform gas exchange across their skin.
A marine biologist dredges up a small animal from the bottom of the ocean. It is uniformly segmented, with short, stiff appendages and soft, flexible skin. It has a complete digestive system and a closed circulatory system, plus multiple true coeloms. Based on this, you determine that the animal must be a(n) _____.

lancelet
mollusc
roundworm
crustacean
annelid

annelid
You find what you believe is a new species of animal. Which of the following characteristics would enable you to argue that it is more closely related to a flatworm than it is to a roundworm?

-It is shaped like a worm.
-It has no coelom.
-It is a suspension feeder.
-It has a mouth and an anus.

It has no coelom.
What would be the best anatomical feature to look for to distinguish a gastropod from a chiton?

presence of a rasp-like feeding structure
number of shell plates
presence of a muscular foot
production of eggs

number of shell plates
What would be the most effective method of reducing the incidence of blood flukes in a human population?

-reduce the population of the intermediate snail host
-reduce the mosquito population
-avoid contact with rodent droppings
-carefully wash all raw fruits and vegetables

reduce the population of the intermediate snail host
Planarians lack dedicated respiratory and circulatory systems because _____.

-none of their cells are far removed from the gastrovascular cavity or from the external environment
-their flame bulbs can carry out respiratory and circulatory functions
-their body cavity, a pseudocoelom, carries out these functions
-they lack mesoderm as embryos and, therefore, lack the adult tissues derived from mesoderm

none of their cells are far removed from the gastrovascular cavity or from the external environment
Which one of these mollusk groups can be classified as suspension feeders?

cephalopods
gastropods
bivalves
chitons

bivalves
Nematodes and arthropods are the largest ecdysozoan phyla.
Which of the following statements are true?

Select all that apply.
-Both nematodes and arthropods must molt in order to increase in size.
-Some nematodes are parasitic on humans.
-The cuticle in nematodes lengthens as the animal grows.
-Arthropods are named for their jointed appendages.
-Nematodes possess a closed circulatory system.
-Both nematodes and arthropods possess an external covering, or cuticle.
-Nematodes are acoelomate, whereas arthropods are coelomate.
-Arthropods possess an open circulatory system.
-Both nematodes and arthropods have segmented body plans.

-Both nematodes and arthropods must molt in order to increase in size.
-Some nematodes are parasitic on humans.
-Arthropods are named for their jointed appendages.
-Both nematodes and arthropods possess an external covering, or cuticle.
-Arthropods possess an open circulatory system.
I skipped 21 Parts B and C
What structure is responsible for gas exchange in most spiders?

chelicerae
book lungs
the pedipalp
Malpighian tubules
tracheal tubes

book lungs
Nematodes and arthropods both _____.

grow by shedding their exoskeleton
develop an anus from the blastopore (pore) formed in the gastrula stage
are suspension feeders
have ciliated larvae

grow by shedding their exoskeleton
Arthropod exoskeletons and mollusk shells both _____.

help retain moisture in terrestrial habitats
completely replace the hydrostatic skeleton
are secreted by the mantle
are comprised of the polysaccharide chitin

help retain moisture in terrestrial habitats
You find a multi-legged animal in your garden and want to determine if it is a centipede or a millipede. You take the animal to a university where a myriapodologist quickly tells you that you have found a centipede. Which of the following may have allowed her to make this distinction?

segmentation
egg-laying
molting
poisonous fangs

poisonous fangs
All arthropods _____.
1) undergo complete metamorphose
2) have jointed appendages
3) molt
4) have segmented bodies
5) have an exoskeleton or cuticle

1, 4, 5
2, 3, 4, 5
3 and 5
1, 2, and 4

2,3,4,5
Which of the following are thought to be most closely related to humans?

ants
snails
jellies
earthworms
sea stars

sea stars
The water vascular system of echinoderms _____.

-functions in locomotion and feeding
-functions as a circulatory system that distributes nutrients to body cells
-is bilateral in organization, even though the adult animal is not bilaterally symmetrical
-is analogous to the gastrovascular cavity of flatworms

functions in locomotion and feeding
Which of the following animal groups is entirely aquatic?

Nematoda
Echinodermata
Crustacea
Mollusca

Echinodermata
Which phylum is characterized by animals that have a segmented body?

Platyhelminthes
Cnidaria
Mollusca
Arthropoda
Porifera

Arthropoda
Select the correct statement(s) about invertebrate taxa.

Select all that apply.

-Tapeworms lack a mouth and gastrovascular cavity.
-Rotifers are smaller than many protists.
-Ectoprocts lack a distinct head.

-Tapeworms lack a mouth and gastrovascular cavity.
-Rotifers are smaller than many protists.
-Ectoprocts lack a distinct head.
Select the correct statement(s) describing nematodes.

Select all that apply.

-All nematodes live in soil.
-Nematodes lack a circulatory system and circular body wall muscles.
-Some nematodes play important roles in nutrient cycling.

-Nematodes lack a circulatory system and circular body wall muscles.
-Some nematodes play important roles in nutrient cycling.
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