Through his observations made in the galapagos islands, formulated a theory of how species change over time, called natural selection.

Acceleration is a direct result of a.) balanced forces b.) unbalanced forces c.) gravity d.) velocity hurry!

Common symptoms of an iron-defiency anemia include muscle weakness shortness of breath and lightheadedness why does iron deficiency causes these symptoms

Everything in the universe originated from a single point. how was it possible for everything in the universe to have occupied a single point in space?