Which statement best describes a cause and its effect that occurs during the process of muscle contraction?

Melissa is interested in her family tree and how her family has changed over its many generations. melissa probably more closely resembles

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?