<span>The correct answer is C) Progesterone promotes fertility because its levels rise during ovulation and immediately after.</span>
Answer:
Revolution is the movement of an object in a circular path. There is direct relationship between distance of planets from the sun and their revolution period. If the distance of a planet is small i. e. near to the sun, so it has less revolution period while the distance between sun and planet is high so more time is consumed to complete one revolution.
Well, natural variation provides the raw material for natural selection,which in turn leads to evolution
electrons don't just fly off into space because charged particles attract each other, keep in mind that alike particles repel off each other.
electromagnetic forces hold the electrons in orbit around the nucleus in the center of the atom. As they move in a repetive motion, they stay close together to stay in line.
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A hydrosphere is the total amount of water on a planet, it can be either liquid vapor or ice. On earth liquid water exists on the surface. Water moves through the hydrosphere cycle. water collects in the clouds then falls down as rain or snow. forming oceans and rivers.