*Question*
Q: How are bacteria cells similar to our cells? Choices: - shape and size - dna and number of protons - plasma and number of protons - dna & plasma membrane A:
**Answer**
dna & plasma membrane

*Question*
Q: At what age is skeletal maturity reached by humans? Choices: - 40 - 30 - 15 - 20 A:
**Answer**
20

*Question*
Q: The planet neptune has strange dark spots that sometimes appear on its surface? what are these spots? Choices: - seas - earthquakes - black holes - storms A:
**Answer**
storms

*Question*
Q: What describe the fraction or percentage of a mixture that is made up of a particular substance. Choices: - molecular scale - atomic weight - solute level - mole fractions A:
**Answer**
mole fractions