Arollerblading fall has produced a skin abrasion on the knee. the skin is broken, along with numerous small blood vessels, resulting in a small, steady of blood.

Invasive species are one of the major threats to biodiversity. these species multiply quickly and compete with native species for food, sunlight, spac and other resources. on the map, determine the area where native species will have limited resources available to them due to invasion threat from invasive species threat very low low medium high very high

Coral reefs support more species per unit area than any other marine environment on earth. what is one way coral reefs are important to the health of the biosphere

In a cladogram' when does a group of organisms branch off