Activities Quiz
1.

According to this phylogenetic tree, annelids are most closely related to _____. (Activity 32A)

question #1

arthropods
mollusks
nematodes
cnidarians
platyhelminths


2.

According to this phylogenetic tree, the clade that includes echinoderms and chordates is most closely related to the clade that includes _____. (Activity 32A)

question #2

mollusks
poriferans
nematodes
cnidarians
nematodes


3.

According to this phylogenetic tree, cnidarians are most closely related to _____. (Activity 32A)

question #3

nematodes
annelids
mollusks
echinoderms
platyhelminths


4.

According to this phylogenetic tree, chordates are most closely related to _____. (Activity 32A)

question #4

arthropods
mollusks
poriferans
echinoderms
cnidarians


5.

Cnidarians are in the _____ clade. (Activity 32A)

parazoan
protostome
radiata
coelomate
bilateria


6.

Platyhelminths are _____. (Activity 32A)

pseudocoelomates
radially symmetrical
acoelomates
diploblastic
coelomates


7.

As a group, how do poriferans, cnidarians, and platyhelminths differ from other animal phyla? (Activity 32A)

They are radially symmetrical.
They do not have a body cavity.
They are triploblastic.
They are diploblastic.
They lack true tissues.


8.

Echinoderms are _____. (Activity 32A)

deuterostomes
parazoans
protostomes
radiata
acoelomates


9.

Mollusks are _____. (Activity 32A)

protostomes
acoelomates
parazoans
deuterostomes
radiata


10.

Protostomes exhibit _____ cleavage; deuterostomes exhibit _____ cleavage. (Activity 32A)

radial and spiral ... determinate and indeterminate
radial and indeterminate ... spiral and determinate
radial and determinate ... spiral and indeterminate
spiral and determinate ... radial and indeterminate
spiral and indeterminate ... radial and determinate


11.

Why are annelids, arthropods, and mollusks placed in the same clade? (Activity 32A)

They are triploblastic.
They are protostomes.
They are bilaterally symmetrical.
They are coelomates.
They are deuterostomes.


12.

Roundworms are classified in the phylum _____. (Activity 32A)

Platyhelminthes
Nematoda
Arthropoda
Porifera
Annelida


13.

In deuterostomes the blastopore develops into the _____. (Activity 32A)

coelom
anus
brain
gastrula
mouth


14.

Grasshoppers are classified in the phylum _____. (Activity 32A)

Annelida
Arthropoda
Cnidaria
Chordata
Nematoda


15.

At the phylum level, you are most closely related to a(n) _____. (Activity 32A)

clam
sea star
earthworm
jelly
planarian



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