Q: What is the term for matter that does not let any light pass through it, whether it absorbs light, reflects light, or does both? Choices: - devoid - obscene - artificial - opaque A:
opaque

Q: What is the major source of water vapor in the atmosphere? Choices: - drift - sea - streams - ocean A:
ocean

Q: Q: Why is blue cheese blue? Choices: - artificial dye - bacteria - fermentation - fungus A:
A: fungus

Question: Q: What important and unusual physical property (for birds) do ostriches and penguins share? Choices: - waterproofness - webbed feet - bonelessness - flightlessness A:
Answer: flightlessness

*Question*
Q: What do we call coiled structures made of dna and proteins? Choices: - nodes - Organisms - Molecules - chromosomes A:
**Answer**
chromosomes

Q: Prions are slow-acting, virtually indestructible infectious proteins that cause diseases of what vital organ in mammals? Choices: - heart - lung - liver - brain A:
brain