Step 1: Answer the questions related to Biology. The function of the cell membrane in a plant cell is to regulate the passage of substances into and out of the cell and to maintain cell integrity*. Two main components of urine are water and urea*. When a red blood cell is placed in pure water, it will swell and burst* (hemolysis) due to osmosis, as water moves into the cell where the solute concentration is higher. The similarity between the ovary and testes is that both are gonads (primary reproductive organs) that produce gametes (eggs in ovaries, sperm in testes) and sex hormones*. Step 2: Answer the questions related to Physics. Electrical energy* is the energy resulting from the flow of electric charge (electrons) through a conductor. If the current in an electrical circuit increases, the electrical energy (or power dissipated) increases*. This is because power ($P$) is directly proportional to the square of the current ($I$) for a given resistance ($R$), i.e., $P = I^2 R$. The magnet was used at the junkyard to separate magnetic metals* (like iron and steel) from non-magnetic materials in the scrap metal pile. Step 3: Answer the questions related to Chemistry. The pH range of a basic solution is greater than 7* (typically from 7.1 to 14). Two characteristics of an element are: It is a pure substance* consisting of only one type of atom. It cannot be broken down* into simpler substances by ordinary chemical means. The component related to the study of elements and reactions of substances is Chemistry*. The apparatus used to measure the volume of liquid or substances accurately is a burette or a pipette for very precise measurements, or a measuring cylinder* for less precise measurements. The symbol (a diamond shape with an exclamation mark inside) followed by "oxidizing" indicates a hazard pictogram for oxidizing substances*. This symbol means the substance can cause or intensify a fire or explosion by yielding oxygen.