When a person receives a vaccine, his or her body
a. receives antibodies against a specific pathogen.
b. creates plasma cells that can produce antibodies against the specific pathogen.
c. creates antigens to fight the specific pathogen.
d. immediately begins fighting the infection caused by the pathogens.

Johnny rode his bike 4 blicks down the street to his friend's house once he got to his friend house and realized he could not cone out to play he turned aroubd and went back home.what is displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

Anton created a chart listing different types of materials. which best complete the chart?

Tropical rain forests support more species per unit area than any other terrestrial ecosystem. what is one way rain forests are important to the health of the biosphere?