Q: Q: What theory explains most of the features of earth's surface? Choices: - Big Bang theory - flat earth theory - string theory - plate tectonics A:
A: plate tectonics

Q: Q: What is it called when plants release water vapor through their leaves? Choices: - propagation - evaporation - respiration - transpiration A:
A: transpiration

Q: Q: Neurons are classified based on the direction in which they carry what? Choices: - metabolism impulses - energy - neurotransmitters - nerve impulses A:
A: nerve impulses

Q: Q: Although it is not vital to humans, calcitonin is important for calcium homeostasis in adults of some species in what group characterized by backbones? Choices: - mammals - reptiles - invertebrates - vertebrates A:
A: vertebrates