Refer to this portion of a dichotomous key to answer the question.

1. (a) has a single dorsal fin ® 5 (b) has a double dorsal fin ® 2
5. (a) has a small fin on back near tail ® 6 (b) has no fin on back near tail ® 7 6. (
a) has barbs near the mouth ® catfish (b) does not have barbs near the mouth ® 10
7. (a) tail is asymmetrical ® sturgeon (b) tail is symmetrical ® 8

what would the result be when identifying a fish with a single dorsal fin, no fin on its back near the tail, and a tail that is asymmetrical?

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