Q: Q: Which theory explains how populations of organisms can change over time? Choices: - free by natural selection - changes by natural selection - intelligent selection - evolution by natural selection A:
A: evolution by natural selection

Q: Q: In police radar, a radar gun sends out short bursts of which waves? Choices: - photons - soundwaves - electrodes - microwaves A:
A: microwaves

Q: Q: What parts of the planet does solar energy have difficulty reaching? Choices: - oceans - deserts - equators - poles A:
A: poles

Q: Q: What is a prerequisite for fertilization to take place in plants? Choices: - mitosis - photosynthesis - germination - pollination A:
A: pollination