Its flu season and a lot of people are getting the flu vaccine. This vaccine is to help boost the immune system by having the B-cells produce antibodies against the flu virus so that they are ready to attack just in case the person contracts the flu. Explain in detail 3 system interactions that aid the immune system with fighting off pathogens. I NEED HELP ASAP

Adigestive system that is a series of tubes beginning at the mouth and ending at the anus is a digestive system.

The table below shows the number of foot bones in some horse fossils.horse fossil recordhorse fossil number of foot bonesp 19q 17r 24s 13ancient horses had more bones in their foot then present-day horses. the present-day horse has 11 foot bones. what is the correct order of evolution of the horse starting from the youngest fossil? a. q p r s b. s r p q c. s q p r d. r p q s

Will mark brainliest. (20 points) many have pigments structures known as eyespots that detect direction of light. a. b. archaebacteria c. protists d. none of the above