Question

command of textual evidence: medium although many transposons, dna sequences that move within an organisms genome through shuffling or duplication, have become corrupted and inactive over time, those from the long interspersed nuclear elements (line) family appear to remain active in the genomes of some species. in humans, they are functionally important within the hippocampus, a brain structure that supports complex cognitive processes. when the results of molecular analysis of two species of octopus - an animal known for its intelligence - were announced in 2022, the confirmation of a line transposon in octopus vulgaris and octopus bimaculoides genomes prompted researchers to hypothesize that that transposon family is tied to a species capacity for advanced cognition. which finding, if true, would most directly support the researchers hypothesis? choose 1 answer: a the line transposon in o. vulgaris and o. bimaculoides genomes is active in an octopus brain structure that functions similarly to the human hippocampus. b the human genome contains multiple transposons from the line family that are all primarily active in the hippocampus. c a consistent number of copies of line transposons is present across the genomes of most octopus species, with few known corruptions.

Explanation:

The researchers' hypothesis is that the LINE transposon family is tied to a species' capacity for advanced cognition. Since in humans, LINE transposons are functionally important in the hippocampus (a brain - structure for complex cognitive processes), if the LINE transposon in octopus is active in a brain structure that functions similarly to the human hippocampus, it would directly support the link between LINE transposons and advanced cognition. Option B only talks about humans and not octopuses in relation to the hypothesis. Option C only mentions the number and integrity of LINE transposons in octopuses without linking to cognitive function.

Answer:

A. The LINE transposon in O. vulgaris and O. bimaculoides genomes is active in an octopus brain structure that functions similarly to the human hippocampus.