Edward jenner discovered vaccinations. he found that some of the dairymaids who worked with cows had suffered lesions on their hands, and that these dairymaids were immune to the more severe smallpox. then, he inoculated james phipps with material from the lesions on a dairymaids’ hands. which best explains why jenner decided to infect phipps?
a. the material contained antibodies that could destroy the smallpox pathogen.
b. the material contained pathogens that were similar to but weaker than the smallpox pathogen.
c. the material had oxygen that could the cells of the body fight off smallpox infection.
d. the material contained a pathogen that could attack the smallpox pathogen.

(B).The material contained pathogens that were similar to but weaker than the smallpox pathogen.

Explanation:

Edward Jenner was a English scientist, who first developed first vaccine of the world. Vaccines contain a killed or weaker forms of pathogens. When injected into host body, they induce immune response and production of memory cells, but cannot cause disease. These memory cells later protect the body from subsequent infections from the wild type strain of that pathogen

Jenner decided to infect Phipps with inoculation from the lesions on hands of a dairymaid because those lesions contained a weaker form of pox viruses that could trigger immune responses in host, but were unable to cause disease.

Thus, the correct answer is option (B).

(B).The material contained pathogens that were similar to but weaker than the smallpox pathogen.

Explanation:

Edward Jenner was a English scientist, who first developed first vaccine of the world. Vaccines contain a killed or weaker forms of pathogens. When injected into host body, they induce immune response and production of memory cells, but cannot cause disease. These memory cells later protect the body from subsequent infections from the wild type strain of that pathogen

Jenner decided to infect Phipps with inoculation from the lesions on hands of a dairymaid because those lesions contained a weaker form of pox viruses that could trigger immune responses in host, but were unable to cause disease.

Thus, the correct answer is option (B).

correct answer is "The material contained pathogens that were similar to but weaker than the smallpox pathogen." Or B

correct answer is "The material contained pathogens that were similar to but weaker than the smallpox pathogen." Or B

then that particular organisms become extinct.

the two answers are a, the population of birds with large beaks will increase on the island, and c, the trait for large beaks will be passed on to future generations through natural selection. the reason for that is because if the birds that have beaks developed for eating small seeds lose all of their food, they will go hungry and eventually starve because they physically cannot eat the large seeds, therefore making the population of large beaked birds higher. also, if the trait of large beaks are dominant on the island over small beaks, then over time the large beaked birds will reproduce more and more, while the smaller beaked birds will reproduce less and less because they can't survive with the food provided. that leads to the trait of small beaks disappearing and the trait of large beaks taking over the island.