The answer is mean!
mean is the average of a group of numbers; therefore, it is the most efficient and accurate!
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Doppler effect and redshift as the light coming from stars from the distance can be shifted in the same way as a pitch of sound does
Explanation:
Organisms don’t have to only reproduce sexually or only reproduce asexually - some animals do both!
When conditions are good, such organisms will reproduce asexually because it is easier. For example, starfish (by fragmentation), slime molds, and water fleas/daphnia (by parthenogenesis) all reproduce asexually when there is plenty of food, minimal predators, and not too much crowding of individuals of the same species.
When conditions worsen (less food, too many individuals, etc), they may switch to sexual reproduction in order to add genetic variation to their population and ensure survival through difficult times.
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Condensation, which is the process by which water vapor is changed back into liquid water. Then precipitation occurs.