In england, a species of moth has two color morphs: gray and white. before the industrial revolution, the white morph was the most common. after the industrial revolution, the gray morph became more common. scientists believe that the gray moths were better able to conceal themselves in the sooty landscape that accompanied early industry. what kind of selection happened?

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