Which oncological disorder often involves leukocoria or a “cat’s eye reflex”?
A. Osteosarcoma
B. Ewing sarcoma
C. Retinoblastoma
D. Neuroblastoma
Select your answer:
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Cellular Respiration › ViewWhen hydrogen ions are pumped from the mitochondrial matrix across the inner membrane and into the intermembrane space, the result is the
A. formation of ATP.
B. restoration of the Na+/K+ balance across the membrane.
C. reduction of NAD+.
D. creation of a proton gradient.
Ecology › View
The graphs below show the changes in crab color at one beach.
Which of the following is most likely to have caused the change in the distribution?
_
A. A new predator arrived that preferred dark-tan crabs.
B. A new predator arrived that preferred light-tan crabs.
C. A change in beach color made medium-tan crabs the least visible to predators.
D. A change in beach color made medium-tan crabs the most visible to predators.