Q: Pressure and vibration are examples of what type of stimuli? Choices: - chemical - atmospheric - thermal - physical A:
physical

Q: What type of cells make up about one quarter of all white blood cells? Choices: - Fat - erythrocytes - tumors - lymphocytes A:
lymphocytes

Q: Q: The human body has as many as two trillion lymphocytes, and lymphocytes make up about 25% of all of what? Choices: - red blood cells - pathogens - glands - leukocytes A:
A: leukocytes

Question: Q: The average number of individuals per unit of area or volume is referred to as a population's what? Choices: - increase - diameter - output - density A:
Answer: density

*Question*
Q: Electric substations have what devices, which use electromagnetic induction to increase or decrease the voltage of the current? Choices: - transistors - generators - tubes - transformers A:
**Answer**
transformers

*Question*
Q: Chemical equations need to be balanced to satisfy the law of what? Choices: - material of matter - glow of matter - speed of matter - conservation of matter A:
**Answer**
conservation of matter