Which action could a student take to make a longitudinal wave? A. Jump on a trampoline.
B. Pluck a guitar string.
C. Jump into a swimming pool.
D. Shake a rope from side to side.

The carbon cycle is best defined as a process in which a. carbon changes from inorganic forms to organic forms and back b. carbon is changed into other elements such as oxygen or nitrogen c. carbon is continually created from the sun’s energy by plants d. carbon is consumed and regenerated from other elements such as oxygen and nitrogen

Which best describes a gene? a. a sister chromatid b. a chromosome c. a tetrad d. a piece of a chromosome

This is an active transport mechanism by which cells pump sodium and potassium ions against the concentration gradient