Q: The saguaro doesn't have any leaves to lose water by which process? Choices: - respiration - evaporation - propagation - transpiration A:
transpiration

Q: What is the smallest unit of a chemical element called? Choices: - cell - droplet - nucleus - atom A:
atom

Q: Q: Partially decayed remains of plants and animals form the organic portion of what? Choices: - minerals - nutrients - grasses - soil A:
A: soil

Question: Q: What is the hardest of all minerals? Choices: - titanium - gold - platinum - diamonds A:
Answer: diamonds

*Question*
Q: What is controlled by both genes and experiences in a given envionment? Choices: - reflexes - instincts - learned behaviors - animal behaviors A:
**Answer**
animal behaviors

*Question*
Q: The abundance of this substance in the atmosphere is what most scientist agree that is causing global warming? Choices: - argon - iron oxide - liquid dioxide - carbon dioxide A:
**Answer**
carbon dioxide