The speed of sound is altered by the? a. pitch of sound b. loudness of the sound c. device producing the sound d. material transmitting the sound

Which macromolecules are polymers made of nucleotides (a) fatty acids (b) nucleic acids (c) carboxylic acids (d) amino acides

Which was most likely an effect on society that resulted from improvements in blood handling during world war i and world war ii?

Which member of the following food chain will be least affected by ddt, a pesticide water pollutant, if bio-magnification is occurring? algae> zooplankton> crayfish> leopard frog> large mouth bass