*Question*
Q: Bacteria can be chemotrophs, which obtain what by breaking down chemical compounds in their environment? Choices: - waste - chemials - food - energy A:
**Answer**
energy

*Question*
Q: What causes genetic disorders in humans? Choices: - variations of chromosome - alterations of genes - pollutants of chromosome - alterations of chromosome A:
**Answer**
alterations of chromosome

*Question*
Q: What process refers to the changes that occur in populations of living organisms over time? Choices: - spontaneous mutation - adaptation - variation - evolution A:
**Answer**
evolution

*Question*
Q: The pollen grain absorbs water and does what after it adheres to the stigma of a carpel? Choices: - reproduces - dissolves - blooms - germinates A:
**Answer**
germinates