Q: Q: Sounds or pictures can be encoded in pulses of what, which are then sent through an optical fiber? Choices: - kinetic energy - microwaves - quasars - laser light A:
A: laser light

Q: Q: The extracellular fluid is in contact with the axon membrane only at what location? Choices: - dendrites - synapses - Sensory Receptors - the nodes A:
A: the nodes

Q: Q: Alterations that change chromosome structure are known as? Choices: - lesions - traits - deformities - mutations A:
A: mutations

Q: Q: What might eventually happen to a species if it is unable to reproduce? Choices: - natural selection - migration - adaptation - extinction A:
A: extinction