Q: Molecules of gas are rare in what outermost region of the planet's atmosphere? Choices: - ozone layer - thermosphere - ionosphere - exosphere A:
exosphere

Q: Making ultrasonic clicks is a clever way that some moths respond to attacks by what flying mammals? Choices: - bees - locusts - birds - bats A:
bats

Q: Q: What is found at the top of the stamen? Choices: - petals - fungi - pistil - pollen A:
A: pollen

Question: Q: What kind of energy does pyruvate have a lot of? Choices: - thermal - nuclear - gravitational - chemical A:
Answer: chemical

*Question*
Q: Multiple sclerosis, huntington's disease, and parkinson's disease all affect what body system? Choices: - reproductive system - circulatory system - lymph system - nervous system A:
**Answer**
nervous system

*Question*
Q: Like a house, your body has what kind of mechanism that responds to changes in temperature? Choices: - external thermostat - mechanical thermostat - sensitive thermostat - internal thermostat A:
**Answer**
internal thermostat