Q: Where does mechanical digestion begin? Choices: - intestines - brain - stomach - mouth A:
mouth

Q: What are the preserved remains of animals, plants, and other organisms called? Choices: - skulls - rocks - basalt - fossils A:
fossils

Q: Q: What substance flows over the land from precipitation or melting snow or ice? Choices: - nitrogen - lava - air - water A:
A: water

Question: Q: Hotspots can be used to tell the speed and direction that what object is moving? Choices: - electrons - crystals - glaciers - plates A:
Answer: plates

*Question*
Q: What are biological catalysts that speeds up biochemical reactions? Choices: - carbohydrates - hormones - proteins - enzymes A:
**Answer**
enzymes

Q: Characterized by a short lifespan, what begin with production in the bone marrow under the influence of csfs and interleukins? Choices: - solutes - pathogens - erythrocytes - leukocytes A:
leukocytes