b) Some vaccinations lose effectiveness over time. For instance, the vaccine for meningitis works for about five years before additional vaccination is required. In terms of specific immune system responses, why would a vaccine lose effectiveness over time? (4 points)​

What is the compliment dna strand to the following sequence: ttgactaggcta

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell

How does the diagram explain ocean currents? earth tilt 23.5 degreesquestion 1 options: earth's tilt causes uneven heating of earth which causes currents.earth's tilt causes the ocean to move because of gravity.earth's tilt and its rotation cause currents.earth's tilt causes uneven distribution of salt which causes currents.