The skin of the poison dart frog contains deadly poisons called batrachotoxins. But the (i)_____of the toxins has remained an enigma, as the frog does not (ii)_____ them. Now an analysis suggests that the melyrid beetle is the source. Collected beetle specimens all contained batrachotoxins, suggesting that these beetles are (iii)_____ by the frogs.

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It is a paradox of the Victorians that they were both _____ and, through their empire, cosmopolitan.

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My grandma has a strong belief in all things _____: she insists, for example, that the house in which she lived as a child was haunted.

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The (i)_____ of molecular oxygen on Earth-sized planets around other stars in the universe would not be (ii)_____ sign of life: molecular oxygen can be a signature of photosynthesis (a biotic process) or merely of the rapid escape of water from the upper reaches of a planetary atmosphere (an abiotic process).

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Given the (i)_____ the committees and the (ii)_____ nature of its investigation, it would be unreasonable to gainsay the committee’s conclusions at first glance.

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Now that photographic prints have become a popular field for collecting, auctions are becoming more (i)_____. It is not just the entry of new collectors into the field that is causing this intensification. Established collectors’ interests are also becoming more (ii)_____. Those who once concentrated on the work of either the nineteenth-century pioneers or the twentieth-century modernists are now keen to have (iii)_____ collections.

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The beauty of the scientific approach is that even when individual researchers do _____ bias or partiality, others can correct them using a framework of evidence on which everyone broadly agrees.

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The reconstruct known work is beautiful and also probably _____: it is the only Hebrew verse written by a woman.

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In a book that inclines to _____, an epilogue arguing that ballet is dead arrives simply as one more overstatement.

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The political upheaval caught most people by surprise: despite the _____ warnings of some commentators, it had never seemed that imminent.

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effect
origin
purpose

Blank (ii)
pressure
produce
suffer from

Blank (i)
effect
origin
purpose

Blank (ii)
pressure
produce
suffer from