Practice questions without fighting the page.

The branch is <b>Gerontology</b>. <ul> <li><b>Why correct:</b> Gerontology studies aging and problems common in elderly people, including diseases, geriatrics aspects, and aging physiology.</li> <li><b>Key concept:</b> Aging biology and health care for older adults; focus is not on youth or non-living science.</li> <li><b>Why others are incorrect:</b> <ul> <li> Cytology = study of cells.</li> <li> Geology = study of Earth’s materials.</li> <li> Zoology = study of animals.</li> </ul></li> <li><b>Exam tip:</b> If the topic mentions elderly or aging, choose Gerontology/geriatrics.</li> </ul>

A novel by Paulo Coelho first published in the year 1988. Originally written in Portuguese.

<div class="ai-exp-block"> <b>Explanation:</b> <p>Adaptation refers to a feature (structural, behavioral, or physiological) that helps an organism survive and reproduce in its specific environment. It arises through natural selection over many generations, favoring traits that improve fitness in local conditions. Other options are not correct: Adjustment is a general term not standard in biology for survival features; Acclimatization is a reversible, short-term response of an individual to changing conditions; Adaptive variation is a broad term that describes variation among individuals, not a single feature enabling survival in a habitat.</p> </div> <div class="ai-did-block"> <b>? Did You Know?</b><br> <p>Adaptations can be structural (like a cactus spine), behavioral (like nocturnal activity in heat), or physiological (like antifreeze proteins in some fish).</p> </div> <div class="ai-remember-block"> <b>? Remember:</b> <p>Adaptation = a trait that helps an organism survive and reproduce in its environment.</p> </div>