Activities Quiz
1.

Which of these statements is true of sponges? (Activity 33A)

They have an open circulatory system.
They are segmented animals.
They have no true tissues.
Food is digested within a gastrovascular cavity.
They are pseudocoelomates.


2.

Which of these statements is true of cnidarians? (Activity 33A)

They have three tissue layers (they are triploblastic)
They respire via book lungs.
They have a nerve net.
They are segmented.
They have an exoskeleton composed of chitin.


3.

Of the phyla studied in this exercise, the simplest (most primitive) one to have three tissue layers is the phylum _____. (Activity 33A)

Cnidaria
Arthropoda
Platyhelminthes
Chordata
Nematoda


4.

Which of these statements is true of nematodes? (Activity 33A)

They lack a nervous system.
They lack a body cavity.
They have a digestive system with two openings.
Their body plan has two main tissue layers.
They are segmented.


5.

Nematodes are most closely related to _____. (Activity 33A)

flatworms
arthropods
rotifers
annelids
chordates


6.

Earthworms are in the phylum _____. (Activity 33A)

Nematoda
Annelida
Chordata
Platyhelminthes
Arthropoda


7.

Which of these statements is true of earthworms? (Activity 33A)

They lack an excretory system.
They have a body cavity.
They have a bony endoskeleton.
Their digestive system consists of a gastrovascular cavity.
Their body plan consists of two tissue layers.


8.

Snails are classified in the phylum _____. (Activity 33A)

Chordata
Mollusca
Cnidaria
Arthropoda
Echinodermata


9.

Which of these characteristics is common to both snails and earthworms? (Activity 33A)

a closed circulatory system
segmentation
two tissue layers
an alimentary system with two openings
an exoskeleton


10.

Grasshoppers respire via _____. (Activity 33A)

their skin
nephridia
book lungs
spiracles and tracheae
Malpighian tubules


11.

Grasshoppers are classified in the phylum _____. (Activity 33A)

Annelida
Mollusca
Nematoda
Arthropoda
Echinodermata


12.

As adults, sea stars _____. (Activity 33A)

exhibit bilateral symmetry
exhibit radial symmetry
are asymmetrical
exhibit no symmetry
lack a digestive system


13.

Which of these is a characteristic of sea stars? (Activity 33A)

a closed circulatory system
nephridia
a brain
two tissue layers
tube feet


14.

Which of these characteristics is shared by both dogs and sea stars? (Activity 33A)

an endoskeleton
a closed circulatory system
no excretory system
a brain
lungs


15.

Dogs are classified in the phylum _____. (Activity 33A)

Echinodermata
Cnidaria
Arthropoda
Mollusca
Chordata



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publishing as Benjamin Cummings