Best Answer: A satellite in a polar orbit passes over both poles, but the earth rotates beneath it. The time taken for each orbit of the earth depends on the height of thsatellitete. If the satellite is in a circular orbit 260 kilometers above the surface it will have an orbital period of two hours.
Chromosomes are thread-like structures present in the nucleus, which carries genetic information from one generation to another. They play a vital role in cell division, heredity, variation, mutation, repair and regeneration.
Convection currents, C! The plates move in a cycle called a convection cell that forms when warm material rise, cool, and even sink.
Earth's history. In the worst one, 250 million years ago, 96 percent of marine species and 70 percent of land species died off. It took millions of years to recover.
