Answer:
As the earth spins on its axis, producing night and day, it also moves about the sun in an elliptical (elongated circle) orbit that requires about 365 1/4 days to complete. The earth's spin axis is tilted with respect to its orbital plane. This is what causes the seasons. At different times of the year, the sun's rays hit different parts of the globe more directly. The angle of the Earth's axis tilts the Northern Hemisphere towards the sun during the summer. Without the tilt of the earth's axis, we wouldn't have seasons.
Explanation:
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In meiosis, the homologues separate in anaphase I and the sister chromatids separate in anaphase II.
Answer:
a long time just kidding
Explanation:
20,000 and 40,000 years ago this can be proved by fossil evidence.
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Answer:
Each combination of an element with a different number of neutrons is called an isotope. The radioactive isotope is called the parent, and the isotope formed by the decay is called the daughter
