Which event occurs when an atom undergoes nuclear fission? O A. Its nucleus combines with another nucleus.
B. Its nucleus releases energy.
ОО
C. Its nucleus gains a small amount of energy.
O
D. Its nucleus gains some mass.
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after making a punnet square using bv bv bv bv you will find that the ratio will be 9: 7 or a 128.6% probability.

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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.