Problem: OPTIONS:
- heat
- lines
- troughs
- wave
Q: Q: Frequency and intensity are two measurable properties of what? A:
Answer: wave

Problem:OPTIONS:
- date
- fluctuations
- time
- sorroundings

Q: When we consider a chemical reaction, we need to take into account both the system and what? A:
****
A: sorroundings

Q: What type of respiration has the advantage of releasing more energy? A:
OPTIONS:
- kinetic
- anaerobic
- elastic
- aerobic
aerobic

Q: What term is used to describe a region getting significantly less precipitation than normal for an extended period of time? A:
OPTIONS:
- dog days
- doldrums
- flood
- drought

Answer: drought

Question: Q: The zygote undergoes many cell divisions before it implants in the lining of what? A:
OPTIONS:
- vagina
- ovaries
- pelvis
- uterus
Answer: uterus

input: OPTIONS:
- cells immune system
- super immune system
- immense immune system
- innate immune system Now, answer this question: Q: What serves as a first responder to pathogenic threats that bypass natural physical and chemical barriers of the body? A:
A:
output:
innate immune system