A population of birds lives on a mountain. In this population, there are red-winged birds, orange-winged birds, and blue-winged birds. A predator eats more of the blue-winged birds because they are not well camouflaged on the red and orange plants that grow on the mountain. This is an example of which mechanism of evolution? a. Natural selection
b. Gene flow
c. Sexual selection
d. Genetic drift

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