Q: Silk and cotton are examples of what type of fibers? Choices: - mechanical - artificial - coral - natural A:
natural

Q: Alveolar ducts and broncioles are developing parts of what organ system? Choices: - nervous - immune - digestive - respiratory A:
respiratory

Q: Q: Any unused energy in food, whether it comes from carbohydrates, proteins, or lipids, is stored in the body where? Choices: - kidneys - spleen - bones - fat A:
A: fat

Question: Q: What term is used to describe an illusion that light from faraway objects is reflected by a pool of water that is not really there? Choices: - version - prototype - Mirror - mirage A:
Answer: mirage

*Question*
Q: Angiosperms possess reproductive structures that attract animals that perform what role? Choices: - evolution - vegetation - isolation - pollination A:
**Answer**
pollination

(Question)
Q: Changing the frequency of sound waves, will change the _________ of the sound of a musical instrument? Choices: - velocity - distance - direction - pitch A:
(Answer)
pitch