Here is a question about this article: During the English Civil War Plymouth sided with the Parliamentarians and was besieged for almost four years by the Royalists. The last major attack by the Royalist was by Sir Richard Grenville leading thousands of soldiers towards Plymouth, but they were defeated by the Plymothians at Freedom Fields Park. The civil war ended as a Parliamentary win, but monarchy was restored by King Charles II in 1660, who imprisoned many of the Parliamentary heroes on Drake's Island. Construction of the Royal Citadel began in 1665, after the Restoration; it was armed with cannon facing both out to sea and into the town, rumoured to be a reminder to residents not to oppose the Crown. Mount Batten tower also dates from around this time.
What is the answer to this question: What locale was used to house imprisoned Parliamentarians after the restoration of Charles II?
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So... Drake's Island

Here is a question about this article: The multi-national Communist armed forces' sole joint action was the Warsaw Pact invasion of Czechoslovakia in August 1968. All member countries, with the exception of the Socialist Republic of Romania and the People's Republic of Albania participated in the invasion.
What is the answer to this question: In which year was the Warsaw Pact activated in a joint action?
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So... 1968

Here is a question about this article: Bacteria display a wide diversity of shapes and sizes, called morphologies. Bacterial cells are about one-tenth the size of eukaryotic cells and are typically 0.55.0 micrometres in length. However, a few species are visible to the unaided eye for example, Thiomargarita namibiensis is up to half a millimetre long and Epulopiscium fishelsoni reaches 0.7 mm. Among the smallest bacteria are members of the genus Mycoplasma, which measure only 0.3 micrometres, as small as the largest viruses. Some bacteria may be even smaller, but these ultramicrobacteria are not well-studied.
What is the answer to this question: Is ultramicrobacteria is well examined?
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So...
not well-studied