input: OPTIONS:
- calcium
- membrane
- collagen
- cartilage Now, answer this question: Q: For skeletal development, the most common template is what? A:
A:
output: cartilage

Q: What occurs when there are differences in fitness among a population? A:

OPTIONS:
- evolution
- natural process
- natural change
- natural selection

Answer: natural selection

Problem: OPTIONS:
- gravity
- acceleration
- velocity
- torque
Q: Q: If a gyroscope is not spinning, it acquires angular momentum in the direction of what? A:
Answer: torque

Problem:OPTIONS:
- proteins
- fat
- air
- water

Q: Salt hydrolysis is a reaction in which one of the ions from a salt reacts with what? A:
****
A: water

Q: The first living cells may have evolved around how long ago? A:
OPTIONS:
- 900,000 years
- 6 billion years
- 2.2 billion years
- 4 billion years
4 billion years

Q: Many discrete characters are determined by a single gene locus with different alleles that produce distinct what? A:
OPTIONS:
- clusters
- phototypes
- subtypes
- phenotypes

Answer:
phenotypes