Q: Only a small percent of earth's water is what type, as opposed to saltwater? Choices: - runoff - groundwater - rainwater - fresh A:
fresh

Q: The concentration of hydronium ions in a solution is known as what? Choices: - base - akaline - pH value - acidity A:
acidity

Q: Q: What is regulated by the reticular formation? Choices: - awkwardness - sleepiness - anxiousness - wakefulness A:
A: wakefulness

Question: Q: Most plant cells have a large central what? Choices: - nuclei - loci - membranes - vacuole A:
Answer: vacuole

*Question*
Q: Water is recycled constantly through which system? Choices: - the hydropshere - the habitat - the troposphere - the ecosystem A:
**Answer**
the ecosystem

(Question)
Q: What system carries messages from sense organs and internal organs to the central nervous system? Choices: - sensitive nervous system - respiratory system - auxiliary nervous system - peripheral nervous system A:
(Answer)
peripheral nervous system