A group of engineers have launched a space probe from Earth that will land on the surface of Mars. How will the force of gravity from Mars affect the space probe?

true                                                                                                       true true true true true true

silt loam

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the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.