Q: Some reactions need extra help to occur quickly. they need another substance called what? Choices: - neurotransmitter - protein - hormone - a catalyst A:
a catalyst

Q: What is the common abbreviation for noting the rhesus blood type? Choices: - h2 - AB - RNA - rh A:
rh

Q: Q: What falls roughly in the middle of the electromagnetic spectrum, having shorter wavelengths and higher frequencies than microwaves, but not as short and high as x rays? Choices: - radio waves - ultraviolet light - gamma rays - light A:
A: light

Question: Q: What type of transport requires no energy and occurs when substances move from areas of higher to lower concentration? Choices: - immune transport - bacterial transport - active transport - passive transport A:
Answer: passive transport

*Question*
Q: Why is the drift velocity negligible? Choices: - shows free charges - less free charges - need free charges - many free charges A:
**Answer**
many free charges

Q: What is the shape of the thyroid gland? Choices: - square-shaped - snake - shaped - triangle-shaped - butterfly-shaped A:
butterfly-shaped