Are protein-wrapped packets of genetic information that invade cells, taking over cellular machinery to replicate. a. microorganisms b. diseases c. viruses d. bacteria

How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?

Reactants undergo chemical reaction to form products. this chemical equation represents one such reaction. the coefficient for one of the reactants or products is incorrect. which part of the chemical equation is incorrect?

What is a photon? a. part of a ribosome b. a light particle c. a carbon dioxide molecule d. part of a chloroplast b. a light particle