Question: Q: What is the tail bone an example of? Read this paragraph and choose the correct option from the provided answers: Some of the most interesting evidence for evolution comes from vestigial structures . These are body parts that are no longer used but are still present in modern organisms. Examples in humans include tail bones and the appendix. Choices: - invertebrate structure - parasitic structure - primordial structure - vestigial structure A:
Answer: vestigial structure

Question: Q: What is the process by which undigested food leaves the body? Read this paragraph and choose the correct option from the provided answers: Choices: - glycolysis - digestion - peristalsis - egestion A:
Answer: egestion

Question: Q: What is a hydrocarbon in which there are only single covalent bonds? Read this paragraph and choose the correct option from the provided answers: An alkane is a hydrocarbon in which there are only single covalent bonds. The simplest alkane is methane, with the molecular formula CH 4 . The carbon is the central atom and makes four single covalent bonds to hydrogen atoms. Choices: - combined - proline - fullerene - alkane A:
Answer:
alkane