BIO 1108 EXAM QUESTIONS AND
ANSWERS A+ GRADED
Soon after the coelom begins to form, a researcher injects a dye into the coelom
of a deuterostome embryo. Initially, the dye should be able to flow directly into
the __________.
gut
What aspect of embryonic development differs between ovoviviparous and
viviparous organisms?
Viviparous organisms nourish their embryos directly, whereas ovoviviparous organisms
are nourished by yolk originally inside the egg.
Which feature appears to have evolved multiple times during the evolution of
animals?
Segmentation
Cephalization, the clustering of neurons and interneurons in the anterior part of
the animal, is apparent in __________.
Planaria
All of the following types of reproduction occur from hydrozoan cnidarians'
reproductive polyps except
sexual reproduction
Biologists currently believe that all animal appendages have some degree of
homology and were derived from a common ancestor with simple appendages
because
genes involved with appendage formation are the same in many different lineages of
animals
Early studies of embryonic development inspired biologists to name one
subgroup of bilaterians protostomes because
the blastopore becomes the mouth
Which embryonic tissue can give rise to muscles in diploblasts?
Endoderm and ectoderm
Cilia are associated with the feeding apparatus of
sponges
Which of the following features evolved earliest in the bilateria?
Triploblasty
Animals that have teeth likely practice which type of feeding strategy?
mass feeding
What distinguishes a coelomate animal from a pseudocoelomate animal?
have a body cavity completely lined by mesodermal tissue, whereas pseudocoelomates
do not.
Which type of reproduction is the least suited to having a very large number of
offspring at once?
Viviparous
Which of the following is not found in bilaterally symmetric organisms?
Cnidocytes
ANSWERS A+ GRADED
Soon after the coelom begins to form, a researcher injects a dye into the coelom
of a deuterostome embryo. Initially, the dye should be able to flow directly into
the __________.
gut
What aspect of embryonic development differs between ovoviviparous and
viviparous organisms?
Viviparous organisms nourish their embryos directly, whereas ovoviviparous organisms
are nourished by yolk originally inside the egg.
Which feature appears to have evolved multiple times during the evolution of
animals?
Segmentation
Cephalization, the clustering of neurons and interneurons in the anterior part of
the animal, is apparent in __________.
Planaria
All of the following types of reproduction occur from hydrozoan cnidarians'
reproductive polyps except
sexual reproduction
Biologists currently believe that all animal appendages have some degree of
homology and were derived from a common ancestor with simple appendages
because
genes involved with appendage formation are the same in many different lineages of
animals
Early studies of embryonic development inspired biologists to name one
subgroup of bilaterians protostomes because
the blastopore becomes the mouth
Which embryonic tissue can give rise to muscles in diploblasts?
Endoderm and ectoderm
Cilia are associated with the feeding apparatus of
sponges
Which of the following features evolved earliest in the bilateria?
Triploblasty
Animals that have teeth likely practice which type of feeding strategy?
mass feeding
What distinguishes a coelomate animal from a pseudocoelomate animal?
have a body cavity completely lined by mesodermal tissue, whereas pseudocoelomates
do not.
Which type of reproduction is the least suited to having a very large number of
offspring at once?
Viviparous
Which of the following is not found in bilaterally symmetric organisms?
Cnidocytes
