Which subatomic particle is used to determine the identity of an element

How can an organ, such as the lungs, work for multiple body systems?

The importance of the mind as a part of the body is an example of:

The serengeti plains are part of the african savanna ecosystem and are home to a variety of different species of plants and animals. the serengeti plains experience a seven-month period of seasonal drought each year, during which the ecosystem receives only four inches of rain and the availability of some resources becomes very scarce. which type of limiting factors does the seasonal drought in the serengeti plains affect?