Answer:
A binary star is a star system consisting of two stars orbiting around their common barycenter. Systems of two or more stars are called multiple star systems. These systems, especially when more distant, often appear to the unaided eye as a single point of light, and are then revealed as multiple by other means.
Answer: passive transport moves down a concentration gradient
Explanation:
Energy-requiring transport is not passive
The DNA structure is made up of molecules called nucleotides
That is true, enzymes are specific.
