Q: Because it damages hair cells, what is the most cause of hearing loss in adults? Choices: - bacteria - ear wax - water in the ears - exposure to noise A:
exposure to noise

Q: Humans need lipids for many vital functions such as storing energy and forming what? Choices: - ionic bonds - zygotes - enzymes - cell membranes A:
cell membranes

Q: Q: Why does water infiltrate the ground? Choices: - gravity - prolonged drought conditions - run-off from flooding - because soil and rocks are porous A:
A: because soil and rocks are porous

Question: Q: What are the earth's two poles called? Choices: - southwest and south - east and west - west and south - north and south A:
Answer: north and south

*Question*
Q: What are small organelles and are the site of protein synthesis? Choices: - nucleus - vacuoles - chloroplasts - ribosomes A:
**Answer**
ribosomes

*Question*
Q: The nuclei of radioisotopes are unstable, so they constantly decay and emit what? Choices: - moisture - acid - chemicals - radiation A:
**Answer**
radiation