Question

even when fish look extremely different from each other, their eggs tend to be similar in appearance. to help scientists ___ various eggs, kylie lev and others at californias steinhart aquarium have launched an open - source catalog of fish eggs using dna information and images of the eggs under a microscope, where their identifying features become more apparent. which choice completes the text with the most logical and precise word or phrase? a select from b expand upon c research with d distinguish between

Explanation:

The context is about helping scientists tell apart different fish eggs (since eggs look similar). "Distinguish between" means to recognize the differences between things, which fits here. "Select from" is about choosing, "expand upon" is about elaborating, and "research with" doesn't fit the meaning of differentiating eggs.

Answer:

D. distinguish between