The number of protons in the nucleus of an atom? A. Atomic number
B. Valence electron
C. Groups
D. Periods

Which identifies the main purpose of biological taxonomy?

Apopulation of black bears depends on salmon from a stream for food. if a drought causes the stream to run dry one year, how will this likely impact the black bear population?

Which short-term environmental change is most likely to lead to ground shifting, landslides, and the collapse of buildings or roads? forest fires flooding earthquakes