This process requires specialized organs such as the lungs or gills. This oxygen is used for cellular respiration and metabolism, a byproduct of which is carbon dioxide.

Molecules released from pathogens are recognised by plant cell surface receptors, and trigger specific signalling cascades that help to defend the plant against attack. The homeostasis of plant ...

Feb. 26, 2025 — Researchers investigating the role of the protein CD44 in obesity and metabolic health found that CD44-deficient mice stayed lean even on a high-fat diet, while the control mice ...

President Trump has been pushing tariffs in the first weeks of his new term. What are tariffs? How do they work? Are they good policy? We explore these questions, and others, in this lesson. By ...