The enzyme that breaks down hydrogen peroxide into water and oxygen in cells is: MCQ with Answer and Explanation

Explanation:
Spectrophotometry quantifies the concentration of a substance by measuring the absorbance of light at specific wavelengths. Chromatography separates mixtures, electrophoresis separates charged molecules, centrifugation separates by density/size. Spectrophotometers are widely used in biochemical and clinical labs.

Explanation:
Biological magnification (or biomagnification) is the process where the concentration of persistent, non-biodegradable toxic substances (like DDT, mercury, or PCBs) increases progressively at each successive trophic level in a food chain. Because these substances are not metabolized or excreted, they accumulate in the tissues of organisms. Top predators end up with the highest, often lethal, concentrations of these toxins.

Explanation:
Charles Darwin's theory of evolution, presented in 'On the Origin of Species' (1859), is based on two main concepts: branching descent (all organisms are related through common ancestry) and natural selection (survival of the fittest). Natural selection states that individuals with traits better suited to their environment are more likely to survive and reproduce, passing those traits to the next generation.