Q: Twin studies have been instrumental in demonstrating what type of component in autism? Choices: - internal - bacterial - natural - environmental A:
environmental

Q: What do many cells depend on glucose for? Choices: - food - heating - osmosis - energy A:
energy

Q: Q: What substances serve as catalysts in most of the biochemical reactions that take place in organisms? Choices: - hormones - carbohydrates - iseotrops - enzymes A:
A: enzymes

Question: Q: The three layers of protective coverings of the spinal cord is called what? Choices: - dermis - tendons - muscles - meninges A:
Answer: meninges

*Question*
Q: Where are unsaturated fatty acids commonly found? Choices: - animal products - butter - fish - oil A:
**Answer**
oil

(Q).
Q: When magma heats groundwater, it may come to the surface as a hot spring or a what? Choices: - pond - cave - volcano - geyser A:
(A).
geyser