Part II Essay Questions
I. Test Adaptation and Item Design
Based on the provided passage, design a cloze test intended for an 11th-grade midterm exam (CEFR B1 level). Please complete the following tasks:
         The animal kingdom is full of impressive quick-change artists, yet few are as unrivaled as the cephalopods of the ocean and the chameleons of the forest. While both are globally celebrated for their color-changing abilities, the biological mechanisms and evolutionary motivations driving their transformations are strikingly different.
        Cephalopods—a group encompassing octopuses, squids, and cuttlefish—orchestrate their transformations through specialized organs called chromatophores. These pigment-filled sacs lie just beneath the skin and are attached to microscopic muscles. So rapid is this contraction that a squid can shift from transparent to vibrant in a mere fraction of a second. Working in conjunction with other reflective cells, this mechanism allows them to produce almost any pattern instantly. Their motivations are multifaceted: they shift colors to blend into coral reefs, practice mimicry to baffle predators, and flash bright hues to intimidate rivals.
       On land, scientists have recently debunked the persistent public misconception that chameleons change color primarily to blend in with their surroundings. A 2015 study revealed that chameleons do not rely on moving pigments. Instead, they utilize "structural coloration" by rearranging a sophisticated lattice of microscopic nanocrystals within their skin. When a chameleon is relaxed, these crystals sit close together, predominantly reflecting blue light. However, as the reptile becomes agitated, the crystal lattice expands, reflecting longer wavelengths such as yellow, orange, and red. Furthermore, a deeper layer of scattered crystals reflects infrared heat, helping the cold-blooded animal regulate its temperature.
      The primary purpose behind these reptilian displays is equally fascinating. It is social communication, rather than the need for camouflage, that primarily drives these dramatic shifts. Male chameleons broadcast conspicuous patterns to assert dominance over territory or court potential mates. Subordinate males typically adopt darker, muted tones to signal submission and avoid further conflict. Since their natural green coloring already provides excellent camouflage among the leaves, their most spectacular transformations serve mainly as visual announcements of status and mood. Ultimately, both creatures showcase the breathtaking ingenuity of evolution.