Q: What term is used to describe structures that are similar in unrelated organisms? Choices: - reproductive - symbolic - isolated - analogous A:
analogous

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:
4 billion years

Q: Q: Why do homonuclear diatomic molecules have zero dipole moment? Choices: - no electrical attraction - no activation energy - at homeostasis - no difference in electronegativity A:
A: no difference in electronegativity

Question: Q: How many chromosomes do bacterial dna have? Choices: - one rectangular chromosome - one triangular chromosome - one simple chromosome - one circular chromosome A:
Answer: one circular chromosome

*Question*
Q: What system carries nerve impulses to internal organs, controlling activities that are not under your control, such as sweating and digesting food? Choices: - limbic nervous system - circulatory nervous system - hormonal nervous system - autonomic nervous system A:
**Answer**
autonomic nervous system

(Question)
Q: What role do proteins play in a biological reaction? Choices: - amino acid chains - antioxidants - reverse hormones - act as catalysts A:
(Answer)
act as catalysts