Compatibility in the ABO blood type is necessary for the blood transfusion, but that is not sufficient to determine the possible donor.
The Rh factor should also be taken into consideration when determining blood transfusion compatibility. A person can be Rh positive or negative, and the Rh positive Rh blood donors can only donate to other Rh-positive people.
Earth is an inner planter!
Reason: The reason why Earth is an inner planet is because there are 4 inner planets and 4 outer planets. Inner planets in order is Mercury, Venus, Earth, Mars. Outer planets in order is Jupiter, Saturn, Uranus, and Neptune (Pluto was discovered a dwarf planet, which is further than Neptune.
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