Read each question, consider the options, then reveal the correct answer and explanation.
The human brain, despite making up only about 2% of total body weight, consumes a disproportionately large amount of the body's energy, primarily in the form of glucose, which serves as its main and most readily usable fuel source for sustaining its high metabolic activity.
Vitamin B12 (cobalamin) is not found in plant foods. It is produced by certain bacteria and obtained primarily from animal products. The body cannot produce it; the statement in question is actually incorrect as vitamins are not produced by the human body except Vitamin D.
Demography is the statistical and interdisciplinary study of human populations, including their size, structure, distribution, and changes over time. Cartography is mapmaking, Geography is the study of places and environments, and Biography is the study of a person's life.
Sunlight is able to penetrate ocean water to a maximum depth of approximately 200 meters, an upper boundary that defines the 'photic zone' (or sunlight zone), beyond which there isn't enough light for photosynthesis to occur, marking the transition to darker ocean depths.
BCC stands for 'Blind Carbon Copy'. It is a field in email applications that allows a sender to send a copy of an email to recipients without revealing their email addresses to other recipients. The option provided is misspelled, making 'None of these' the correct choice.
In PowerPoint, when you open a presentation in Normal view, the left panel typically shows the 'Slides' tab and the 'Outline' tab. The 'Notes' are displayed in a separate pane at the bottom of the screen, not on the left panel. Therefore, 'Notes' is not available there.
The Aedes aegypti mosquito is the primary vector responsible for transmitting the dengue virus to humans, along with other diseases like Zika and chikungunya. This is distinct from the Anopheles mosquito, which is instead the vector responsible for transmitting malaria.
A neutron is one of the three primary subatomic particles found in an atom (along with protons and electrons) and is unique in carrying no electrical charge at all, making it electrically neutral, unlike the positively charged proton and the negatively charged electron.
A starfish (sea star) is an invertebrate, meaning it lacks a vertebral column (backbone) entirely, unlike whales and sharks, which are both vertebrates (whales being mammals and sharks being fish), each possessing an internal skeletal structure that includes a spine.
Dr. Shirley Jackson, an accomplished physicist, conducted groundbreaking theoretical physics research at Bell Labs that contributed significantly to the development of technologies underlying fiber optic communications, telecommunications, and other key innovations.
