BIOLOGY 123 EXAM PRACTICE
QUESTIONS AND 100% VERIFIED
CORRECT ANSWERS!!!
What should animals with radial symmetry be better able to do than those with bilateral
symmetry?
a)move quickly in one direction
b)detect threats from above or below equally well
c)deal effectively with food distributed homogeneously in all directions
d)focus attention in a single direction
C
Which genetic change is thought to have led to the increasing complexity of the arthropod
body plan?
a)increased number of Hox genes for body segmentation
b)changes in regulation of Hox genes for body segmentation
c)increased number of Hox genes for appendages
d)changes in regulation of Hox genes for appendages
e)increased complexity in genes for exoskeleton arrangements
B
Which statement about Hox genes would lose points on a test?
a)The Hox gene family underwent a series of duplications.
b)Most animals share a unique homeobox-containing family of genes.
c)Hox genes regulate the formation of the anterior-posterior axis.
d)Simple animals such as sponges possess Hox genes.
D
,Scientists researching the origins of multicellularity compared domains of _____ proteins
of unicellular organisms with those of certain animals.
a)fibrillin
b)collagen
c)elastin
d)cadherin
e)keratin
D
Which is not a reason for the rise in the diversity of animal phyla during the Cambrian?
a)Predators acquired novel adaptations.
b)Prey species acquired new defenses.
c)An increase in atmospheric oxygen permitted larger bodied animals to thrive.
d)Hox genes facilitated the evolution of new forms.
e)Global cooling triggered shifts in animal lineages.
E
Which of the following triploblastic organisms is incorrectly paired with its body cavity
classification?
a)flatworm—pseudocoelomate
b)earthworm—coelomate
c)planarian—acoelomate
A
In which type of cleavage pattern does each cell have the capacity to develop into a
complete embryo?
a)determinate cleavage
b)indeterminate cleavage
,c)spiral cleavage
d)none of the above
B
Which taxonomic level contains the other choices?
a)Deuterostomia
b)Lophotrochozoa
c)Ecdysozoa
d)Eumetazoa
D
Which is not true of the Neoproterozoic era?
a)Soft-bodied, multicellular eukaryotes could be found.
b)Molluscs, sponges, and cnidarians could be found.
c)Predation existed.
d)Animal diversity decreased.
e)Glaciers killed most life on Earth.
D
For the eighth observation (i = 8), identify the animal phylum, xi, and yi.
a)phylum Cephalochordata; xi = 33; yi = 68
b)phylum Urochordata;xi = 77; yi = 25
c)phylum Porifera;xi = 5.8; yi = 25
d)phylum Urochordata;xi = 25; yi = 77
D
Which animal phylum has greater complexity (measured by yi) than Urochordata?
, a)Echinodermata
b)Annelida
c)Arthropoda
d)All phyla are equally complex.
B
What does a correlation coefficient measure?
a)the degree of complexity in an organism
b)how much DNA two organisms share
c)how two data sets are related
d)how similar limbs are
e)the number of genes in the nuclei of different animals
C
Which characterize(s) an animal body plan?
a)symmetry
b)tissues
c)body cavity
d)a and c
e)a, b, and c
E
Place these groups in the order in which they appeared: 1. Porifera 2. Cnidaria 3. Aceola 4.
Nematoda
a)2, 3, 4, 1
b)1, 2, 3, 4
c)3, 4, 1, 2
d)4, 3, 1, 2
e)3, 2, 4, 1
QUESTIONS AND 100% VERIFIED
CORRECT ANSWERS!!!
What should animals with radial symmetry be better able to do than those with bilateral
symmetry?
a)move quickly in one direction
b)detect threats from above or below equally well
c)deal effectively with food distributed homogeneously in all directions
d)focus attention in a single direction
C
Which genetic change is thought to have led to the increasing complexity of the arthropod
body plan?
a)increased number of Hox genes for body segmentation
b)changes in regulation of Hox genes for body segmentation
c)increased number of Hox genes for appendages
d)changes in regulation of Hox genes for appendages
e)increased complexity in genes for exoskeleton arrangements
B
Which statement about Hox genes would lose points on a test?
a)The Hox gene family underwent a series of duplications.
b)Most animals share a unique homeobox-containing family of genes.
c)Hox genes regulate the formation of the anterior-posterior axis.
d)Simple animals such as sponges possess Hox genes.
D
,Scientists researching the origins of multicellularity compared domains of _____ proteins
of unicellular organisms with those of certain animals.
a)fibrillin
b)collagen
c)elastin
d)cadherin
e)keratin
D
Which is not a reason for the rise in the diversity of animal phyla during the Cambrian?
a)Predators acquired novel adaptations.
b)Prey species acquired new defenses.
c)An increase in atmospheric oxygen permitted larger bodied animals to thrive.
d)Hox genes facilitated the evolution of new forms.
e)Global cooling triggered shifts in animal lineages.
E
Which of the following triploblastic organisms is incorrectly paired with its body cavity
classification?
a)flatworm—pseudocoelomate
b)earthworm—coelomate
c)planarian—acoelomate
A
In which type of cleavage pattern does each cell have the capacity to develop into a
complete embryo?
a)determinate cleavage
b)indeterminate cleavage
,c)spiral cleavage
d)none of the above
B
Which taxonomic level contains the other choices?
a)Deuterostomia
b)Lophotrochozoa
c)Ecdysozoa
d)Eumetazoa
D
Which is not true of the Neoproterozoic era?
a)Soft-bodied, multicellular eukaryotes could be found.
b)Molluscs, sponges, and cnidarians could be found.
c)Predation existed.
d)Animal diversity decreased.
e)Glaciers killed most life on Earth.
D
For the eighth observation (i = 8), identify the animal phylum, xi, and yi.
a)phylum Cephalochordata; xi = 33; yi = 68
b)phylum Urochordata;xi = 77; yi = 25
c)phylum Porifera;xi = 5.8; yi = 25
d)phylum Urochordata;xi = 25; yi = 77
D
Which animal phylum has greater complexity (measured by yi) than Urochordata?
, a)Echinodermata
b)Annelida
c)Arthropoda
d)All phyla are equally complex.
B
What does a correlation coefficient measure?
a)the degree of complexity in an organism
b)how much DNA two organisms share
c)how two data sets are related
d)how similar limbs are
e)the number of genes in the nuclei of different animals
C
Which characterize(s) an animal body plan?
a)symmetry
b)tissues
c)body cavity
d)a and c
e)a, b, and c
E
Place these groups in the order in which they appeared: 1. Porifera 2. Cnidaria 3. Aceola 4.
Nematoda
a)2, 3, 4, 1
b)1, 2, 3, 4
c)3, 4, 1, 2
d)4, 3, 1, 2
e)3, 2, 4, 1
