Problem: OPTIONS:
- eons
- days
- minutes
- lifetime
Q: Q: Memory t cells are long-lived and can even persist for how long? A:
Answer: lifetime
Problem: OPTIONS:
- acids
- paint
- organism
- protein
Q: Q: A virus is essentially dna or rna surrounded by a coat of what? A:
Answer: protein
Problem: OPTIONS:
- winds
- fossils
- tides
- waves
Q: Q: What do wavelengths measure the size of? A:
Answer:
waves