Some energy sources are wind turbines, generation from air resistance
Nonvascular plants don't have seeds. They reproduce sexually and asexually. Vascular plants have tubes that carry water up the plant and nonvascular don't have that
Frequency is the term that describes the number of waves passing a point during a certain period of time, frequency is also measured in Hz (hertz).
<span>what really led into that was most likely the evolution period, all of the reptiles were subdivided into noticeable stages
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