Question

a preserved specimen of the marine protist g. conglobatus collected from the south atlantic has been identified as the species lectotype, a term —— that this specimen serves as the basis for all formal scientific descriptions of the species. which choice completes the text so that it conforms to the conventions of standard english? a is indicating b has indicated c indicated d indicating

Explanation:

In Standard English, the most appropriate phrase is "is indicated" when referring to something being pointed out or signified. "Is indicating" is present - continuous and doesn't fit the context here. "Has indicated" is present - perfect and not suitable for this general - description context. "Indicated" alone is a past - participle and needs an auxiliary verb to be grammatically correct in this sentence.

Answer:

A. is indicated