Which of the following describe(s) the role of cytotoxic t cells in the specific immune response? i. they kill cancer cells. ii. they kill cells infected by viruses. iii. they interact with mhc-i molecules

In this experiment you were asked to present three possible mechanisms. describe those mechanisms here and include drawings of those mechanisms. how will the bromination of trans-cinnamic acid and trans-stilbene allow you to distinguish between the three possibilities? what would you expect to find in your data in each scenario?

Variety of living organisms; includes genetic, species, and ecological types.

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his 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