Answer:
vaccination
Explanation:
Vaccination also called immunization is the administration of antigenic material called a vaccine to produce active artificial immunity against a disease. Vaccination protects humans from infections of many diseases. Examples include tuberculosis poliomyelitis, whooping cough, diphtheria and measles.
Active artificial immunity is where antibodies are formed in response to administration of dead or weakened( attenuated) pathogens or chemically treated toxoids.
Answer:
males have one X and one Y chromosome.
Explanation:
Twenty-two of these pairs, called autosomes, look the same in both males and females. The 23rd pair, the sex chromosomes, differ between males and females. Females have two copies of the X chromosome, while males have one X and one Y chromosome.
Answer:
I'm not sure what's your question but, Barry bike is cheaper than Anne, since for Barry one bike just cost 50 dollars, while for Anne, one bike is 75dollars
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