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Exam- Bio 1108 - Animal Diversity Exam Test Questions and Answers 100% Pass
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Exam- Bio 1108 - Animal Diversity Exam Test Questions and Answers 100% Pass
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Exam- Bio 1108 - Animal Diversity Exam Test Questionsand Answers 100% Pass
Analogies CORRECT ANS-Characters that can evolve more than once in separate groups by
convergent evolution
Homologies CORRECT ANS-Characters that are similar due to common ancestry
Poriferans CORRECT ANS-The phylum that is made up of sponges
Cnidarians CORRECT ANS-The phylum that contains jellyfish and sea anemones
Radial symmetry CORRECT ANS-Organisms who's bodies have an axis that runs from
mouth to base with many planes of symmetry through this axis; usually organisms like this
are in the phylum cnidaria
Bilateral symmetry CORRECT ANS-Organisms who's bodies have a distinct head and tail,
marking front and back, with a single plane of symmetry running between them at the
midline; animals like this are clustered in the Bilateria branch
, Exam- Bio 1108 - Animal Diversity Exam Test Questions
and Answers 100% Pass
Acoelomates CORRECT ANS-Bilaterians without a body cavity
Coelomates CORRECT ANS-Bilaterians with a body cavity
Pseudocoelomates CORRECT ANS-Bilaterians with a body cavity that does not completely
surround the internal organs
What does a fluid-filled body cavity do? CORRECT ANS-It cushions the internal organs
against hard blows to the body and enables the body to turn without twisting these organs. It
also allows internal organs like the stomach to expand, enhancing digestive function
Diploblastic CORRECT ANS-Cnidarian embryos that have two germ layers, the ectoderm
and the endoderm.
Triploblastic CORRECT ANS-Bilateral embryos that have three germ layers, the ectoderm,
endoderm and misoderm
, Exam- Bio 1108 - Animal Diversity Exam Test Questions
and Answers 100% Pass
Protostomes CORRECT ANS-The first opening to the internal cavity of cavity of the
developing embryo, called the blastopore, becomes the mouth
What happens to the blastopore in deuterostomes? CORRECT ANS-The blastopore
becomes the anus
What are the two subgroups can the protostome phyla be divided into? CORRECT ANS-
Lophotrochozoans and ecdysozoans
What are the characteristics of the cells on the outside of a sponge? CORRECT ANS-These
cells are tough and act as the sponge's skin
Choanocytes CORRECT ANS-Cells that have a flagella and function in nutrition and gas
exchange. They have a collar of small cilia around their flagellum; located in the interior of
sponges
, Exam- Bio 1108 - Animal Diversity Exam Test Questions
and Answers 100% Pass
Mesohyl CORRECT ANS-A gelatinous mass (between the interior and exterior cell layers in
a sponge) that is mostly noncellular, but does contains some amoeba-like cells that function in
skeleton formation and the dispersal of nutrients
How do sponges gain nutrition? CORRECT ANS-Intracellular digestion; The choanocytes
that surround the interior chamber of the sponge beat their flagella, creating a current that
draws water from the outside the body, through the pores in its walls and upward through
the central cavity of the sponge, where it exits through the large opening at the top. The
water contains food particles and dissolved organic mater, which cells lining the cavity
capture by endocytosis.
How do sponges reproduce? CORRECT ANS-Cells recruited from the choanocyte layer
migrate into the mesohyl, where they undergo meiosis and differentiate as sperm or eggs.
Sperm released into the water fuse with eggs in the meshy of other sponges.
Spicules CORRECT ANS-The simple structures that act as skeletons in sponges
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