Adult members of the ____ Cnidarian lineage, including jellyfishes,are predominately medusae and are not active
swimmers.
a. Hydrozoa
b. Scyphozoa
c. Trematoda
d. Cubozoa
e. Anthozoa
ANSWER: b
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Which type of speciation mechanism have the Honeycreepers of Hawaii undergone?
a. Gene flow b. Sexual selection c. Stabilizing selection d. Sympatric e. Allopatric
Compared to when the Na+ channel is closed, how will the transport of Waste molecules change when the Na+ channel is open? The rate of Waste transport out of the cell will:
a) Increase b) Decrease c) Not change
The molecule that can carry foreign DNA into host cells is a(n) ____.
A. cloning vector B. transcriptase C. DNA ligase D. endonuclease E. DNA polymerase
A population of squirrels is preyed on by small hawks at maturity. The smaller adult squirrels can escape into burrows. The larger adult squirrels can fight off the hawks. After several generations, the squirrels in the area tend to be very small or very large. This is an example of __________.
a. disruptive selection b. stabilizing selection c. directional selection d. balancing selection e. Hardy-Weinberg equilibrium