Why is there the same amount of water on the earth now as there was a million years ago

2. given that most biochemical (other than coal) rocks react with hydrochloric acid, what does that tell you about organisms?

All organisms contribute some water to the water cycle by conducting

Ineed to get this test done which of the following statements is correct in hour our immune system responds to a potential pathogen? a.) the skin will be the first line of defense, and then the many phagocytes in the bloodstream will attempt to consume the possible pathogen. b.) b cells will start reading the antigen code immediately and call t cells to assist in destroying the pathogen. c.) the adapted immune system will call on the innate immune system to destroy the pathogen. d.) the t-cells in the adapted immune systems are the first to recognize the pathogen