1.What is Darwin's theory of the origin of species?
2.What sorts of signals does the brain use to communicate sensations, thoughts and actions?
3.Why does a year consist of 365 days and a day of 24 hours?
4.Why is the sky blue?
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Answer:
1.Species of organisms arise and develop through the natural selection of small, inherited variations that increase the individual's ability to compete, survive, and reproduce.
2.The signals used by the brain to communicate sensations, thoughts, and actions are the electrochemical signals.
3.A year has 365 days, because this is the time the Earth takes to complete 1 full revolution aroung the Sun. A day has 24 hours, because this is the time the Earth takes to complete 1 full rotation on its axis.
4.As white light passes through our atmosphere, tiny air molecules cause it to 'scatter'. Violet and blue light have the shortest wavelengths and red light has the longest. Therefore, blue light is scattered more than red light and the sky appears blue during the day.
Explanation:
Brainliest me please