What are 2 ways nitrogen becomes useable to plants, humans, and animals?

List two limitations of natural selection

Where would you expect to see seedless plants, such as ferns and mosses? a. in a botanical museum, because they are all extinct b. low and close to the ground in a moist environment c. climbing high while circling the branches of another plant d. deeply rooted in a forest with a trunk that reaches 20 meters or more

What advantages does a pedigree have over a written passage?