Small birds will often mob large predatory birds such as owls and hawks. this behavior involves the smaller birds gathering or flying near the larger bird, calling loudly, and even striking the larger bird, and may result in the larger bird leaving the area. this behavior is risky for the smaller birds but is commonly seen. from this description we can reasonably conclude that:
a. birds are not intelligent enough to know that the larger bird is dangerous
b. this behavior is clearly maladaptive and should be eliminated by natural selection
c. there must be some advantage of this behavior, such as protecting their chicks, that makes the risks worthwhile
d. these birds must have learned this behavior by operant conditioning

Which of the following statements is correct in hour our immune system responds to a potential pathogen? a. the adapted immune system will call on the innate immune system to destroy the pathogen. b. b cells will start reading the antigen code immediately and call t cells to assist in destroying the pathogen. c. the skin will be the first line of defense, and then the many phagocytes in the bloodstream will attempt to consume the possible pathogen. d. the t-cells in the adapted immune systems are the first to recognize the pathogen vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a. antigen, antibody b. antibody, antigen c. antibody, antibiotic d. antibiotic, antibody