The speed of sound waves through two different media, steel and air, was recorded. according to the graph, sound waves travel a) through steel, but not through air. b) faster through steel than through air. c) faster through air than through steel. d) through steel and air at similar speeds.

The wings of insects, birds, and bats evolved independently but carry out similar functions. this is an example of a. analogous structures. b. embryonic structures. c. vestigial structures. d. homologous structures.

How have high taxes on tobacco products impacted the number of people who use them? a. the number of tobacco users has increased. b. the number of tobacco users has decreased. c. the number of tobacco users has not changed. d. the number of adolescent tobacco users decreased, while the number of adult users increased

Which of th following best describes how genes produce traits in an organism?