Three characteristics that are unique to mammals include their  ability to feed their babies with milk made in their mammary  glands. Mammals also have hair on their bodies â¦and they have a  single bone that makes up their lower jaw.
buoyancy. n. 1. the ability to float in a liquid or to rise in a fluid. 2. (General Physics) the property of a fluid to exert an upward force (upthrust) on a body that is wholly or partly submerged in it. 3. the ability to recover quickly after setbacks; resilience.
How to Calculate Buoyancy Two Methods: Using the Buoyancy Force Equation Performing a Simple Buoyancy Experiment Community Q&A Buoyancy is the force acting opposite the direction of gravity that affects all objects submerged in a fluid.