Q: Reactant concentrations are highest at which part of a reaction? Choices: - ending - middle - concurrent - beginning A:
beginning

Q: What do chemical reactions need to be activated? Choices: - food - space - products - energy A:
energy

Q: Q: Arteries carry oxygenated blood away from the heart, what carries un-oxygenated blood back to the heart? Choices: - glands - intestines - lungs - veins A:
A: veins

Question: Q: When populations get close to the carrying capacity, what happens to growth? Choices: - halts - dies - spikes - slows A:
Answer: slows

*Question*
Q: What are misfolded versions of normal brain proteins? Choices: - ribosomes - protons - humans - prions A:
**Answer**
prions

Q: Q: A solution is what type of mixture, where the dissolved particles are spread evenly through the mixture? Choices: - saline - gaseous - heterogeneous - homogeneous A:
A: homogeneous