LLAS 1190 Lecture Notes - Lecture 1: Comparative Embryology, Diploblasty, Cephalization

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Chapter 33 Practice Quiz KEY
Comparative embryology helped clarify the relationships among major groups of animals. Bilaterians, for
example, are all:
A) diploblastic.
B) triploblastic.
C) coelomates.
D) acoelomates.
E) protostomes.
As in many other animals, the endoderm in cnidarians functions in formation of:
A) the respiration system.
B) prey capture mechanisms.
C) the digestive system.
D) the locomotory system.
Animals colonized land after plants did. The first animals to colonize land were _____, about _____ million
years ago.
A) mammals; 542
B) arthropods; 420
C) reptiles; 579
D) dinosaurs; 360
What is an advantages of having a true coelom?
A) A true coelom allows the animal to live underground.
B) A true coelom allows the body to move independently of the movement of internal organs.
C) A true coelom allowed for evolution of cephalization.
D) A true coelom allowed for the evolution of mouthparts.
According to the phylogenetic tree shown, which of the answer choices correctly lists the sequence in which
multicellularity, tissues, and bilateral symmetry arose, from the oldest characteristic to the most recent?
A) multicellularity, tissues, bilateral symmetry
B) multicellularity, bilateral symmetry, tissues
C) tissues, bilateral symmetry, multicellularity
D) tissues, multicellularity, bilateral symmetry
E) That information cannot be determined from the phylogeny.
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