Q: Which types of muscles cause bones to move when they retract? Choices: - working muscles - active muscles - bone muscles - skeletal muscles A:
skeletal muscles

Q: It was not until the era of the ancient greeks that we have any record of how people tried to explain the chemical changes they observed and used. at that time, natural objects were thought to consist of only four basic elements: earth, air, fire, and this? Choices: - sky - soul - grass - water A:
water

Q: Q: Muscle groups are controlled by what mechanism? Choices: - activation energy - cerebral cortex - growth hormones - motor cortex A:
A: motor cortex

Question: Q: What are complex organic molecules that make up cells? Choices: - sugars - carbohydrates - acids - proteins A:
Answer: proteins

*Question*
Q: Which virus causes cold sores? Choices: - flu virus - microbes virus - stilts virus - herpes virus A:
**Answer**
herpes virus

Q: Q: Shivering and adipose tissue called brown fat are used by mammals in particular to produce what? Choices: - energy - blood - nutrition - heat A:
A: heat