Photosynthesis

Evolution is a process of change over time. The word evolution may refer to various types of change. For example, scientists generally describe the… See more » Natural selection is a process in nature by which the organisms best suited to their environment are the ones most likely to leave offspring. This… See more » Spontaneous generation refers to the theory that certain forms of life, such as flies, worms, and mice, can develop directly from nonliving things,… See more »