Q: A substance that displays different colors when in the presence of an acid or a base is called what? Choices: - pH scale - reactor - litmus test - an acid-base indicator A:
an acid-base indicator

Q: Where do most of the steps of cellular respiration take place? Choices: - ribosomes - nucleus - cytoplasm - mitochondria A:
mitochondria

Q: Q: Many european and asiatic elms are less susceptible to dutch elm disease than which elms? Choices: - caribbean - rican - african - american A:
A: american

Question: Q: The decay rate is measured in a unit called the what? Choices: - decay rate - exponential decay - radioactive decay - half-life A:
Answer: half-life

*Question*
Q: What factor largely determines the distinguishing features of terrestrial biomes? Choices: - density - sea level - migration - climate A:
**Answer**
climate

Q: What occurs when light reflects off a very smooth surface and forms a clear image? Choices: - projection - absorption - refraction - regular reflection A:
regular reflection