T cells are white blood cells that are important for adaptive immunity. They have unique cell surface receptors that are generated by randomly assorting genes. These receptors allow T cells to ...
It’s just one of those fundamental things – all animals need water to survive. For us humans, getting it into our bodies is as simple as drinking it. But what about fish? They live in water, so are ...
Unfortunately, this simplest approach doesn’t always work as expected. The pie chart doesn’t chart the blank cell, but the legend still displays the category label, as shown below. Removing ...
Look closely at this image, stripped of its caption, and join the moderated conversation about what you and other students see. By The Learning Network Look closely at this image, stripped of ...
A fuel cell is a device that generates electric energy through electrochemical reactions between an oxidizing agent and a fuel – a material that stores energy in chemical form. Both species are ...