Q: How do some animals change their depth? A:
OPTIONS:
- mass migration
- metamorphosis
- spontaneous mutations
- by changing their density

Answer: by changing their density

Question: Q: The study of how organisms develop is known as? A:
OPTIONS:
- ethology
- botany
- physics
- embryology
Answer: embryology

input with options: Q: Parasitism, mutualism, and commensalism are all examples of what type of biological relationship? A:
OPTIONS:
- adaptation
- reproduction
- evolution
- symbiosis
output: symbiosis

Q: Q: What do you call reversible changes that do not change matter's chemical makeup or chemical properties? A:

OPTIONS:
- potential changes
- element changes
- chemical changes
- physical changes

A: physical changes

input: OPTIONS:
- surge
- threshold
- frequency
- crest Now, answer this question: Q: The highest point of a wave is called? A:
A:
output: crest

Question: Q: Where are about 75% of the tar sands in the world located? A:
OPTIONS:
- china and onatrio, canada
- alberta, canada and peru
- venezuela and onatrio,canada
- venezuela and alberta, canada
Answer:
venezuela and alberta, canada