Answer:
Cyclical changes in eccentricity are changes in the shape of Earth's orbit.
Changes in obliquity are the changes in Earth's tilt on its axis.
Earth also experiences a precession around its axis.
The cycles affect climate by altering the duration of Earth's seasons and temperature decreases between summer and winter
Explanation:
B.they make thier own food
Answer:
A. improve the conditions of people in other countries.
Answer:
Adenine and guanine are purines, while thymine, cytosine and uracil are pyrimidines.
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