Q: The cell wall acts as an extra layer of protection, helps the cell maintain its shape, and prevents what? Choices: - extinction - exhaustion - Respiration - dehydration A:
dehydration

Q: The electron beam scans the surface of the sample, usually coated with a thin film of which metal? Choices: - platinum - silver - copper - gold A:
gold

Q: Q: What is the name for the amount of water vapor in the air? Choices: - ambient - heat - viscosity - humidity A:
A: humidity

Question: Q: What do heterotrophic animals usually consume? Choices: - soil - minerals - plants - other organisms A:
Answer: other organisms

*Question*
Q: Cow manure can have a second life as a source of what gas? Choices: - freon - hydrogen - ethanol - methane A:
**Answer**
methane

*Question*
Q: What is another name for a reasonable explanation for something that might be formed near the beginning of a scientific inquiry into a problem? Choices: - experiment - conclusion - theory - hypothesis A:
**Answer**
hypothesis