Question: Q: Survivorship curves show the distribution of individuals in a population according to what metric? Choices: - weight - height - birth rate - age A:
Answer: age

Question: Q: When lactose is present in the cell, what allows the lac genes to be expressed? Choices: - concentration of repressor protein - binding of expressor protein - the addition of water - nonbinding of repressor protein A:
Answer: nonbinding of repressor protein

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