Contagion - A general term for any disease-causing infectious agent spread by direct or indirect contact.⏎
Exoskeleton - An external skeleton that protects and supports an organism, in contrast to an internal endoskeleton.⏎
Climate Change - The process of shifting from one prevailing state in regional or global climate to another. Climate change is typically the preferred term over “global warming” because it helps to convey that the characteristics of climate change are not limited to rising temperatures.⏎
Evolution - The change in heritable traits in a population of organisms over successive generations.⏎