BSC 2011-L (Animal Diversity)
MIDTERM EXAM - FORM A
Choose the one alternative that best completes the statement or answers the question.
At which stage would one be able to first distinguish a diploblastic embryo from a triploblastic embryo?
The major branches of Eumetazoa are the Radiata and the Bilateria. These names refer to what characteristic of these animals?
A) presence or absence of a nucleus in their cells
B) body symmetry
C) types of appendages
D) embryonic cleavage
Cephalization is primarily associated with _____.
A) a method of reproduction.
B) a type of digestive system.
C) the fate of the blastopore.
D) adapting to aquatic environments.
E) bilateral symmetry.
What distinguishes a coelomate animal from a pseudocoelomate animal is that coelomates _____.
A) contain tissues derived from mesoderm, whereas pseudocoelomates have no such tissue.
B) have a gut that lacks suspension within the body cavity, whereas pseudocoelomates have mesenteries that hold the digestive system
C) have a body cavity completely lined by mesodermal tissue, whereas pseudocoelomates do not.
D) have a complete digestive system with mouth and anus, whereas pseudocoelomates have a digestive tract with only one opening.
E) have a body cavity, whereas pseudocoelomates have a solid body.
Which of the following is descriptive of protostomes?
A) spiral and determinate cleavage, blastopore becomes anus, enterocoelous development
B) spiral and indeterminate cleavage, blastopore becomes mouth, schizocoelous development
C) radial and determinate cleavage, blastopore becomes anus, enterocoelous development
D) spiral and determinate cleavage, blastopore becomes mouth, schizocoelous development
E) radial and determinate cleavage, blastopore becomes mouth, schizocoelous development
The most ancient branch point in animal evolution is that between having _____.
A) a well-defined head or no head.
B) a body cavity or no body cavity.
C) diploblastic or triploblastic embryos.
D) true tissues or no tissues.
E) radial or bilateral symmetry.
The correct sequence from the most to the least comprehensive of the taxonomic levels listed here is
A) kingdom, phylum, order, class, family, genus, and species.
B) phylum, kingdom, order, class, species, family, and genus.
C) kingdom, phylum, class, order, family, genus, and species.
D) family, phylum, class, kingdom, order, species, and genus.
E) phylum, family, class, order, kingdom, genus, and species.
What are the flagellated cells in a sponge that are primarily responsible for trapping food particles from circulating water called?
B) mesohyl cells
C) epidermal cells
D) pore cells (porocytes)
Which of the following is/are
not associated with sponges?