<span>a. Cretaceous
</span>The continents began to drift apart by the end of the _______ period.
NOT:
b. Cambrian
c. Neogene
<span>d. Permian</span><span>
</span>
Answer:
There is no such thing as an abiotic organism, because abiotic means non-living, chemical, and physical. Perhaps you could be referring to a dead organism? But it would still be inaccurate.