*Question*
Q: Exothermic reactions in organisms are called what? Choices: - nuclear reactions - nebular reactions - biogenic reactions - catabolic reactions A:
**Answer**
catabolic reactions

*Question*
Q: The law of conservation mass states that matter cannot be created or what? Choices: - changed - moved - observed - destroyed A:
**Answer**
destroyed

*Question*
Q: Light has the properties of both a wave and what else? Choices: - atom - nucleus - electron - particle A:
**Answer**
particle

*Question*
Q: In desert cactus, thorns that protect the water held in a large, barrel-shaped stem are an example of what? Choices: - feature - characteristic - species - adaptation A:
**Answer**
adaptation