Members of this phylum have radial symmetry, and use their two tentacles to capture prey. They have
eight longitudinal plates of cilia that they use for movement, making them the largest animals to use
cilia as their primary means of locomotion.
a. Nematoda
b. Cnidaria
c. Porifera
d. Rotifera
e. Ctenophora
E
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Ribosomes are made up of:
A. only RNA molecules. B. only DNA molecules. C. DNA and RNA. D. protein and RNA. E. only protein molecules.
What form of coloration is shown by many seahorses?
A. Batesian B. aposematic C. Müllerian D. camouflage
A researcher wants to create a mouse model for a disease, to allow her team to study possible therapies. The disease is known to be caused by a small deletion that removes a certain gene. Which type of mouse would be the best choice for this purpose?
A. tissue-specific gene knockout B. conditional knockout mouse activated by a drug C. knockin mouse D. mutant derived by traditional forward genetics screen E. knockout mouse
If a behavior has evolved by natural selection, it must have ________.
A. evolved the same way in each species B. a genetic basis C. reduced the predation rate on the animal D. benefits for both males and females