Answer:
50% of the moon is illuminated during a third quarter phase
B, C, D
A is r-selected species
<span>D) Asexual reproduction is advantageous over sexual reproduction because it decreases the snails' need for social interaction.</span>
A) 5
Half-life is the time it will take for a quantity to reduce to half its initial value. In this case, uranium will undergo radioactive decay, and after 700 mil years, 5 of the 10 uranium atoms will have decayed.
