Biomechanics Learn how the skeleton moves at its joints with help from muscles, including examples of hinge, pivot, and ball and socket joints. Adult and embryonic stem cells There are two types ...

The natural world is a finely-tuned balance of biotic (living) and abiotic (nonliving) components that shape our environments. Various biotic factors directly affect processes like population growth, ...

For example, ecologists may study microbes living in the soil under your feet or animals ... Biodiversity also includes the richness of species of living organisms on earth. The environment is the ...